Computer Troubleshooting Daquan 2
Symptom: a computer can be used normally during the day, the night can only move up and down the mouse.
Analyze and solve: 1) X-axis or the mouse ball is dirty, clean the mouse after the fault is still open. 2) Optical Mouse mouse connection system damage or damage, no fault with a multimeter. 3) Check the main interface is also no problem. 4) found a 40W lamp next to the computer, turn off the lamp fault disappears. Since the semi-mechanical mouse using optical techniques, using a longer time, a large gap mouse button, light easily enters the inside thereof, thus resulting in failure of the mouse. Computer far away from light during the day, it can work. But the night 40W lamps only a foot away from the computer, the light source is so close and strong. So the mouse on strike.
Solution: a black paper, and cut the size of the mouse housing, or attached to the replacement of the mouse inside a genuine brand name mouse.
2, fault phenomenon: a host computer, each boot BIOS parameters must be reset in order to enter the system. After everything is normal, shutdown restart into the system, the value of the BIOS is lost. But the heat did not start this phenomenon.
Analyze and solve: 1. change BIOS battery, useless. 2. virus, not the virus. 3. found to have a floor-standing speakers, each time the user always first shut off the host, so strong reflux electric floor-standing speakers in the impact motherboard motherboard CMOS loss of information, using different wiring board can be resolved.
3, phenomenon: just bought a computer in the office often for no reason restart automatically.
Analysis of solution: 1. Open the front view CPU temperature, the fan is good, normal temperature, good fan rotation. 2. virus, non-toxic. 3. Place the hard disk low grid, low-grid crashes in the process, the hard disk in the other machines on the grid after the low, less than a day to start on its own. 4. The power or suspected motherboard problem, replacing the fault persists. 5. Finally found, the computer connected with a power line conditioning, whenever the air conditioner is started. It will form a relatively high induced voltage, the voltage due to sudden changes in the computer itself started, the regulator connected to the device solution.
4, phenomenon: a computer, the Philips 17 inches flat screen display for color display, only a few days after the display was found poor color purity, and the edges of the image distortion is generated.
Analyze and solve: 1. change the display, the fault persists. 2. The power floorstander found put in less than 1 meter from the display position. This results in a strong magnetic field (magnetic flux leakage is likely speaker) of the floor speakers, so that the display color (14-inch color display is generally no degaussing function) After the speaker is removed, the display returns to normal.
5, fault phenomenon: a computer when a sudden turn black.
Analysis of solution: black is generally due to CPU, memory, graphics card with the motherboard, or damage caused by poor contact. After opening the box found inside the case due to the often no time to clean up, leading to a lot of dust accumulated inside the chassis, resulting in poor contact between the individual and produce blank screen.
Solution: Remove the respective chassis members and cleaned with brush, and the member is assembled, troubleshooting.
6, fault phenomenon: the use of a computer for a long time, and cleaned up, there was a problem can be installed. Symptoms: Computer black screen and kept sounding.
Analyze and solve: Computer black screen and kept sounding, indicating that the failure is caused by memory or memory slots on the motherboard caused. 1) re-insert the memory many times the fault persists. 2) to the memory to get this problem have appeared on other machines, which proves the problem is not memory slots on the motherboard. 3) with the eraser rub memory finger, and inserted back into the motherboard, the results of the fault disappears. Because often time-use oxidation caused by the finger part, makes contact with the slot cheat poor, causing various failures.
7, recently I have such a machine fault: after power supply can work, but usually black, occasionally normal start, but while running on a black screen.
Analyze and solve: Due to the occasional start, it can not be the cause of the power supply. Alternatively the method for display inspection is normal. Further, because there is no alarm boot, whereby that card, the possibility of a very small memory. Therefore, the analysis is likely to be caused by the bad parts, then what is the bad part of it? In the main, poor contact caused by a blank screen may be CPU, so take the CPU, clean it, then careful placement confidently boot. Fault still! Strange, is it a problem with memory, the motherboard does not call the police? Simply test piece by piece, anyway, I here there is a computer. The test results showed that: memory, CPU, graphics card, hard disk were normal. Motherboard problem! No reason for it. Lamb, to simply remove the motherboard from the chassis, disconnect all the connections, plug CPU, memory, hard drives, video cards, power supply, with a screwdriver POWER consecutive jumpers on the motherboard, OK! Normal boot up! To test the boot is not accidental, retry several times, and continuous power for a long time did not appear blank screen. It seems not the motherboard problem, is likely to be in some of those bad connection. All my carefully to plug in all the connections, but also confidently turn. The fault is still, it seems that the problem lies in these connections, simply try it one by one. When the RESET line to test, a fault, a multimeter is it brought amount ......, ...... really is halo RESET line shorting. Failure to find eliminate it simple. Found the short circuit RESET line separating good, all OK.
Founder machine fault 8,99: 1 can sometimes start, there will not turn pressed N times, and each time the long beep alarm press the power switch, the boot can be used normally, but sometimes lose control mouse. Power check: that memory problems, tested power supply, memory, cpu, hard, healthy Handicap everything is normal, the last update the BIOS. Everything was settled. This is the original play.
9, the fault phenomenon: a compatible assembly configured to S694TA-name motherboard, Tualatin 1.3GHz processor, graphics MX400, 20GB hard drive, 52 × drive, 256MB SDRAM, Patriot 17 inches flat screen monitors. After more than a month to use, then suddenly turn off after a few seconds the power indicator light only, and no error sound speakers, computer completely crashes.
Failure causes and solutions:
1. Open the front carefully observed, while the discovery CPU fan rotation immediately stop the rotation start instant, interval of 1 minute after turning off the computer is turned on again found in the boot CPU fan rotation moment laps do not turn. Followed by multimeter test motherboard fan power output terminal of a + 12V, have found that the start instant power of about + 7V, 0.5V duration sharp decline to 1 second, the replacement of a new power adjustment again, the fault persists.
2. The use of fault exclusion range compression method, one by one hard disk, floppy disk drives, power-off, then the sound card, Modem eleven removed, but the fault persists. The machine is sequentially display card, memory, CPU, cooling fan, disconnect the keyboard from the motherboard, and no change to the test question on another computer. Such range is compressed to failure on this board.
3. first with a multimeter voltage monitoring + 12V, + 5V other multimeter voltage monitoring, power found: + 12V + 12V voltage to a sharp decline after the sudden disappearance of + 6V. Judge is certainly a problem on the motherboard, and most likely is the emergence of more serious short circuit. We know that, in most cases, a short circuit would mean a higher element temperature, and immediately hands touch each chip, feel the temperature is very low. However, when a hand touches the next CPU socket transistor (Q2) is a heat sink, the transistor of this feeling burning hot fins, the problem lies in the opinion of only the transistor associated circuitry. This board is a motherboard jumper settings Free by Q2 and the other mating components provide a corresponding voltage to the CPU. After the power is turned off multimeter block measuring resistor R × 1Ω transistor with the ground resistance value of only about 0.4Ω. In this transistor with a soldering iron, to observe the surface of the printed mark model FP45N03L, that it belongs to the manual check transistor NPN type power transistor, the tube was measured to determine damaged. To eliminate potential problems with the R × 1Ω continued to block the collector of transistor Q2 to ground resistance was measured, the resistance value obtained is still about 0.4 [Omega], there seems to place a short-circuit.
The measurement range is limited around the CPU power supply circuit, and the transistor element is focused electrolytic filter capacitor. The investigation electrolytic filter capacitor C144 (1500μF / 63V) across a resistance value close to zero, it will be measured with a multimeter after welding charge and discharge resistor, the value found only about 4 ohms, and no discharge phenomenon. Measured again another electrolytic filter capacitor C155 (1500μF / 63V) with a capacitor in parallel with the road resistance value, the resistance value is still obtained approximately 0.4Ω. C155 test again the welding resistance value, only about 0.4Ω. So far it has been found three component damage, this time again measured collector of Q2 to ground resistance value was found to around 500 [Omega has been restored, the collector-to-ground resistance values returned to normal, the short-circuit troubleshooting.
4. The newly purchased power transistor and two electrolytic capacitors 1500μF / 63V respectively choosing polarity and re-welded. And then loaded on the CPU, cooling fan, video card, memory, keyboard, display and other components. Reboot test, the computer well into Windows98, and stable operation.
10, failure phenomenon: show boot: "REPLACE SYSTERM DISK AND PRESS ANYKEY TO CONTINUE": prompt appears after "DISK I / O ERR, REPLACE DISK TO CONTINUE", button. D Win98 disk to reinstall the system cover, boot graphics cards, sound cards, etc. can not be scanned within the cat, Office and other applications also suggest: no support for Windows Installer can not start. The cause and solution to this prompt is displayed a hard disk failure. Please first hard drive data cable re-plug again, make sure that no poor contact phenomenon. Then ScanDisk tool such as Norton Disk Doctor (Disk Doctor) or Windows comes with Scandisk disk scanning to repair bad sectors. If the physical bad sectors, it is recommended to find a dealer to replace. From the point of view the phenomenon of hard disk damage may be more serious, it is estimated to format the C drive reinstall the system to resolve.
11, failure phenomenon: because of the need, I upgraded the CPU and motherboard (XP1800 +, elite K7S5A), still with SD 256MB of memory, IBM 20GB hard disk. Whether you choose to upgrade or new installation of the operating system, when the installation program to detect the disk, it will display "C drive has been damaged and can not be repaired", run ScanDisk (standard) to exit back to Win98 C drive after the discovery is indeed a mistake, but the repair after the installation of the problem remains, which partition to install the WinXP too, borrowed from a friend of a new IBM 40GB hard disk, the problem remains, for the one data line as well.
Problem Cause and Solution 1) You may open the option in the BIOS anti-virus, usually in the "Advanced BIOS Features Setup Option" in the "Virus Warning", set it to "Disabled". Onboard ships are anti-viral mechanisms to prevent the virus master hard disk boot sector is rewritten, if trying to rewrite, it will prompt alarm. However, the boot record on the hard disk must be added to the MBR operating system installation. Then the BIOS will think that there is a virus trying to rewrite the master boot sector and will terminate the operation. 2) may restore your machine to install the software or restore the device class card, hard disk protection card, if you please install its ban. 3) If your machine is installed in a RAID device, so before you install WinXP to copy files based on third-party RAID driver is prompted to load the bottom of the screen. 4) Try to repartition the hard disk, and must remember that the primary partition (ie C drive) is activated, and then reformat the hard disk.
12, failure phenomenon: my friend's computer is equipped with a new, CPU Celeron 1.1GHz, no-name motherboard is 815E, the graphics and sound are integrated, the system is Win2000. Shutdown time, the "Windows is shutting down" blue screen after screen (mouse sometimes active, sometimes it died there), crashed.
1. The cause of the malfunction and could be solved with some software conflict, close all software that is running before shutting down. 2. Check with the motherboard advanced power management conflict. Please install the latest drivers for your motherboard's BIOS 3. Go to the "Power Management Setup" option, you will see "ACPI Function" option and the "ACPI Suspend Type" option to "ACPI Suspend Type" is set to S1 (POS), reboot into the system to see if also freezes the situation. If you continue to set the "ACPI Function" is set to "Disabled", then "PM Control by APM" is set to "Yes". This will turn off your ACPI advanced power management options, but in the Win2000 system can not support Suspend to RAM (STR) or suspend to disk (STD) up.
13. Symptom: My computer monitor is MAG 770PF, GeForce2 (32MB) Match cards, two days before boot into Windows graphical interface after the crash. After rebooting into safe mode to disable the card to enter the normal Windows, but the picture quality is poor, Windows optimization guru after tests found almost zero performance 2D, 3D performance is also greatly reduced.
Failure Analysis: This problem is the graphics card driver is not properly installed. Please download the latest graphics driver drive and motherboard chip set. If you install the motherboard VIA VIA AGP driver after installing the motherboard 4in1 drivers. Then enter safe mode, open the Device Manager in the "Display Adapters" in the original video card driver delete, reboot into safe mode again to install the motherboard drivers AGP patch, and then restart in normal mode to enter the system. In this way you will be prompted to find new equipment required to install the driver, the path to the directory where the latest graphics drivers can be installed.
14, failure phenomenon: the system can not be installed, configured no-name 845GL motherboard, ASL GF4, DDR256, P41.7, BENQ52X drive, Maxtor 40G hard drive, the system is installed either can not copy files, or very slow.
Solution: Since I can not copy files, consider CD-ROM and CD-ROM are replaced with a new try, the problem persists, look there is no fever, no memory have been changed, with the efficiency of the source hard disk check, no problem, power supply also replaced (because I used to come once the system is not installed, and finally the power supply problem), and then for the optical drive data cable, or not resolved until after the change of hard drive data cable the OK.
15, failure phenomenon: the Internet often dropped, and then also how Rom. (The ADSL) This function ping to ping. Change change card modem for network line can not solve the problem, there is no virus. (Winxp system) result I re-installed the network card driver had enough, and had 8139 card in xp system drive is not required, the system can recognize. I did not expect the system comes with drivers actually have a problem.
16, failure phenomenon: a computer brand after the company found that 15 minutes to get the computer speakers will emit shrill hum every pulse. At first thought it was a sound problem, for the same fault or a post. Then redo the system. the same. So I called the computer company of people, they do not know how it was. One day I put the computer off but forgot to turn off the speaker. That shrill voice is still there, I suddenly remembered we have here to install the alarm, the alarm is Gaoping electric pulse device emits a sound effect. Off the alarm after everything is normal.
17, phenomenon: during use IE to browse the web page, a message is displayed "Microsoft Internet Explorer has encountered a problem and needs to close ......" in. At this point, if you click "Send Error Report" button will create an error report, then click the "Close" button will cause the current IE window is closed; if you click "Do not Send" button, all IE window is closed.
Fault Comments: This is a small program to understand the IE user error in use and design, but I do not want to be Microsoft's "free testers", not to mention that it will face thousands of reports every day, who knows there are reports did not care about my problem? !
Troubleshooting: For different situations, you can use the following methods were closed send an error report IE features: ① on IE 5.x users, perform the "Control Panel → Add or Remove Programs", select "Internet Explorer Error Reporting" option in the list, then click "change / remove" button to remove it from the system. ② users of IE 6.0 / 2000 under Windows 9x / Me / NT, you can open the "Registry Editor", find [HKEY_LOCAL_MACHINE\Software \Microsoft\Internet Explorer\Main], created in the right pane named IEWatsonEnabled DWORD byte value, and assigned to zero. ③ IE 6.0 for Windows XP users, but in the implementation of the "Control Panel → System", switch to the "Advanced" tab, click "Error Reporting" button, select "Disable error reporting" option and select the "serious error occurred notify me "and finally click" OK "button.
18. Symptom: When using IE browsing some pages error prompt dialog box appears: "This program has performed an illegal * for, is coming off ......" and click "OK" button and then pop up a dialog box that prompts "took place internal error……". Click the "OK" button, all open IE windows are closed.
Fault Comments: This error produces a variety of reasons, take up too much memory resources, IE security level is set and browsing the website does not match, conflicts with other software, visit the website itself contains an error code ...... these cases are likely to need patience to be addressed.
Troubleshooting:
① too close IE window. If you need to share memory-intensive programs, recommended IE windows open no more than five.
② lower IE security level. The implementation of the "Tools → Internet Options" menu, select "Security" tab, click "Default Level" button, drag the slider to reduce the default security level.
③ will upgrade to the latest version of IE. IE 6.0 SP1 Download " JavaScript:.. if (this.width> screen.width -366) this.width = screen.width-366 "border = 0> ownload.microsoft.com IE may be used as the core of the browser, it takes up system resources such as MyIE2 relatively small, and when the browser fails to close, next time you start it, there will be "whether to turn the page when the last error occurred" message, as much as possible to help you recover damages.
19, failure phenomenon: DOS boot failure caused by start
troubleshooting: DOS boot system consists of DOS boot sector and system files DOS file system includes iosys, msdos.sys, command.com, which is a DOS shell command.com file, other similar available. file replacement, but the default state is essential DOS boot files. DOS in Windows 95 systems carry, msdos.sys is a text file, is to start the windows must file, but can only do this when starting DOS file. DOS boot error but can boot the system from a floppy disk or CD, after use sys c: to repair the fault delivery system, including the boot sector and system files can be automatically restored to a normal state
20, it Failure phenomenon: mistakenly formatted hard disk data recovery
Troubleshooting: In the DOS version of the high state, the format operation format in the default state have been established for recovering formatted disk information, is actually the disk DOS boot sector All the content area, fat partition table and the table of contents are copied to a disk sector in the last few (rarely used because of the back of the sector), while the contents of the data area has not changed by this operation. "unformat c:" to restore the original file allocation table and the table of contents, thus completing the recovery disk information further DOS also provides a miror command is used to record the current information disk recovery for use after formatted or deleted, this method is also more effective.
21, failure phenomenon: a grid out C-hours, I reinstall the Win98 system, then install the motherboard drivers, sound drivers, video drivers, but installing the graphics driver, restart the computer, after the blue sky, the cursor is positioned Twinkle, twinkle upper left corner, 10 minutes later, there was still flash, with no meaning into the system, how it happened? Troubleshooting: Restart the computer into safe mode and found that the sound card and graphics card drivers installed correctly. Look startup items did not load other programs. Restart a smooth entry into Win98, but the screen color is 16 colors, how can do that, adjusted for the 16-bit true color, start again, but stopped at the last screen position motionless. After restarted numerous times, the system finally went in, still 16 colors. But a hint to attract me, bottom line is that the display adapter settings are correct, and asked if re-set. I chose "Yes", then the Display Properties dialog box appears, set a page that says "unknown device in (on NvidiaVanta)", I finally understand the unknown device turned out to be my Compaq 1517F monitor, so immediately re-install the driver a good monitor, and then restart, ha ha, along with the beautiful music started, I successfully enter Win98, vivid colors once again in front.
12, 22, Symptom: My computer used for a long time, can be regarded as antiques. But due to the recent overwhelmed, strike several times, feel the speed is getting slower and slower. But also suffered a small problem, the system slows down time, often after a good tune time, a few days later slowed down, often need to adjust the time, it is troublesome.
Troubleshooting: I think the beginning of the motherboard battery is dead, but for a new fault persists. Later see related articles on the newspapers to find memory errors can also cause the system time, according to the method mentioned in the text, adjust the memory settings, but the fault is still as baffled. Careful observation motherboard, beside the size of a resistor board battery, two pin components, silver solder metal housing shell package on the motherboard, like electronic timepiece quartz crystal. Think carefully, computer clock generator should be used and the electronic timepiece is the same, are made capacitors, resistors, quartz crystal constituting the timer circuit. Time allowed on the motherboard usually caused by the failure or deterioration of the circuit components, and the capacitance and quartz crystal is usually the main cause of the time allowed. After analyzing the cause of the malfunction, with many years of experience in the maintenance, exclude such failures would be much easier.
First with anhydrous alcohol swab to clean the vicinity of the timing circuit board, near the main capacitor because the capacitance caused by dust contamination abnormality work will slow down the clock. The problem is not solved, and may seek to replace the quartz crystal capacitance, during the welding to be noted that the electric iron be ground or * pulling power soldering iron, so as to avoid destruction due to static electricity board. If you are not sure, then, the best a repair expert help, so as to avoid unnecessary losses. If your computer clock is slow and not memory failure, try this method it
23, failure phenomenon: a new configuration of the machine, CPU AMD Sempron 2200+ ASUS A7V600-X memory DATA 256DDR 400 Maxtor 80G seven FX5200 128MB graphics Bahrain WIN98 system after the installation of all drivers when the machine enters skip WIN98 when the screen machine has to stay there only to see a horizontal line in the beating, the problem still exists after the restart, boot into safe mode, open the startup items and did not find any problems, see the device Manager there is no abnormality, and finally to delete the graphics driver , and finally replaced by another version of a drive but I still, began to think that the problem is the system reinstall the system after Bahrain this system, I first installed the graphics driver, restart the computer into the system as usual, but then put a motherboard drivers installed on the system and can not enter, and enter safe mode to delete a 4-in-one on a high after changing versions installed, the problem still exists, which is the same with strange Xuan machines installed the same drive other machines properly, I have also experienced similar problems, change IDE port problem is solved, according to previous experience so he put the machine in question change IDE port but the boot problem persists, the motherboard is not all right! So I changed him motherboards, or not installed on the final, only for graphics cards under it a try, and halo ~ ~ Department at all levels has often entered into, blame the individual graphics driver installed on my machine is good ah, so I put a piece of suspected faulty graphics card plugged into the motherboard on the other, then with the strange point is not on wow ~ ~ ~ * ~ who are so evil after so toss a big wave to determine the problem out on the graphics card ~~ Please lead to, for example, as the boot is like the beginning spoken comes out, I think we would have seen ~ ~ after all, this is the computer Well the problem is more ~~~~~~~ ~ ~
24 Symptom: pOST computer in DOS normal, into the XP initialization is normal, there is an error in the selection window will pop up, regardless of the election after the blue screen appears safe mode or otherwise are running. Detection and treatment: re-install XP CD-ROM appears in the initialization process can not find fastfat.sys, press any key and restart, can not be reinstalled. Later the CPU, memory, graphics reinstalled computer smoothly start. Not re-install the system.
The reason: I personally believe is a computer hardware failure, resulting in the Caozuojitong Bunengtongguo self-test.
25, failure phenomenon: two PC computer with the AC line couplet *, XP operating system, desktop displays two connected to normal. My Network Places can only see their own do not see each other.
Check: a machine through Ping own function, a machine additionally display Ping nowhere; Ping own and another machine ping another machine not pass, the coupling can not access ADSL.
Processing: The Ping nowhere a PC card inserted re-install, reinstall the driver and also set accordingly. When re-Ping, two PC can pass from My Network Places can each be able to see each other.
Fault: The card is not fully engaged with the computer.
26, failure phenomenon: boot monitor self-test to see on the video card motionless. Check: the same card or replaced; CPU fan rotation but have some CPU overheating, remove the fan heat sink base to remove the original weight of the silica. Then boot smoothly into the system self-test, all OK.
27, the cause of the malfunction: the boot has been crash, or half into the will, this machine is the 2000 system, boot to the blue scroll bar in 2000 has stopped halfway! But occasionally can barely into the system ...
Solution: Since energy into the system, causing it to see if there is a virus, virus scanning; there is no virus, then check out the various hardware or replace hardware inspection whether there would be any hardware failure after checking to be sure the hardware is no problem ... Hey `this case is strange? ? Helpless, the recovery time was just to use GHOST installed, after restoration, started operating normally, but after less than half an hour and crashed `` `? ? ? Hardware, the other no problem ah? The system will be a problem? No way, off the grid on the C drive, try on another system, for good after the XP system, run as usual, then they have not discovered the phenomenon of death ...
After a computer, use the XP system, start: 28 Symptom always restarts analysis solution: 1 kill viruses, to no avail; 2 to replace the CMOS settings, to no avail; 3 replacing the memory, get the reason: memory is too small, can not use the XP system!
29, failure phenomenon: a compatible computer, installed the original WIN2000 system, there has been displaying unusual phenomenon. After reloading XP system, into the normal mode into the System icon black; into safe mode completely normal.
Analyze and solve: 1, a resolution that is too high, into the safe mode to modify, or black; 2, Safe Mode found to have a conflict on the graphics card and the motherboard, the motherboard driven by the conflict deleted, restart normally enter, but modify the resolution and a black screen, restart or black; 3, reinstall the graphics driver, or black; 4, re-install the graphics card, the problem is solved.
The reason: Graphics loose poured into the system caused by a picture on a black screen.
30, Symptom: a IBM6824 machine, boot crash, alternative test, motherboards, memory, CPU normal, graphics cards, network integration, but minimize the test are normal, brush the BIOS, black brush will not suddenly found plug the mouse is minimized he died, not inserted properly.
Solution: unplug the mouse, the mouse had been all bent needle, causing P / S2 shorted crash, go to replace the mouse internal security, OK!
31, failure phenomenon: I865 motherboard, P2.4cpu, 256 RAM, graphics card brand, playing three-dimensional game speed can be, is the first time in ten minutes will be playing songs Dayton analysis: originally I thought it was software, from the sound card installed, play software, system, or not, and then he sent a swap memory cards ....... brand power did not change, the twisted customers badly battered, had to hold try ideas, readily took the same power supply is not a I think the problem is solved, and sometimes poor quality power supply can cause many weird problems.
32, failure reasons: Lenovo machine, WINDOWS 98 system starts to flag when a black screen failure
analysis: mad restart, the fault persists, memory, CPU, graphics card, the main version, power supply, no problem. Reinstall the system, not a black screen during installation of the system, when the system starts to Bahrain WINDOWS mark the fault persists, repartition your drive, Bahrain system, the problem is solved.
33, failure phenomenon: a friend yesterday, then repair a computer, the elite K7S5A motherboard, Duron 700M, XP operating system. Keyboard self-test failure is an error, and can not enter the system BIOS.
13, solution analysis: first with a multimeter and keyboard port, etc. all normal peripheral resistance and capacitance, resistance to ground is also normal. It is suspected motherboard I / O chip IT8705 damage, the change or useless. When stalled, just next to one of the XP1800 + CPU, the chip will not be damaged, right? Immediately put on boot, hey! everything is normal. Bring bad CPU replaced a closer look with a magnifying glass, the core of the lower right corner there is a little gap. After asking the owner, the original CPU to win many times.
34, Symptom: with just a computer, GA-8IG1000-G, KingstonDDr400 , Celeron D2.6G, GOLDENFIELD chassis. After installed with three or four days is normal, after each boot Huaping not boot normally, but occasionally can boot. Like "The Matrix" character appears at the beginning of the picture, like non-stop rolling when the video.
Solution: When assembling think, that the staff of the wiring on the motherboard and chassis not very familiar with it too Jieshangqu, perhaps the problem lies here. It is described later with the motherboard connection, we found the opposite positive and negative ends Reset line with other wiring, so he press motherboard manual contact, get, the video crash no longer occurs.
35, the fault phenomenon: a compatible assembly, to be transported by a b, the results show no boot! Hard long bright lights!
Diagnosis: Since this machine to run in a good condition, suspected to be caused during transportation board loose, but still can not boot after re-plug after use voltage meter measured indoor voltage, found that only 160 volts, and got regulator, after fault disappears!
36, failure phenomenon: Lenovo brand, business trip useless for some time, came back to find the system password can not enter, others thought it was a joke revised, decided to redo the system.
After the first into CMOS, CMOS password can also get in, I think people are really vicious ah, then open the case to discharge, in the BIOS boot priority to the ROM, the system at one go, and then I reset the password, restart: diagnosis and find that it can not enter, this time I think the keyboard is not a problem ah, ah may keypad lights are on, the keys will not be a problem, so I installed the keyboard to remove the power-on password is no other computer, in Notepad this input English letters, found the keyboard winning letters distortion in the output, and Ying Solutions tough.
37, failure phenomenon: gigabyte 845E, HY128M, C42.4GHZ, ST40G, Colorful graphics in time to re-install the system, when installed win98 no problem, if it is 2000 or XP and they will be prompted to copy files, however, please check CD, I replaced the CD drive replaced, replaced data line, replaced memory, replaced the hard drive, I made almost powerless, and finally for a piece of board, OK! Ha ha ha, fainted it!
38, phenomenon: the sudden appearance of a machine company display a severe wobble, sometimes sometimes display a black screen, then that is the electromagnetic interference, but the speaker is removed, the fault still! (It seems not caused by electromagnetic interference), so I went to check the monitor connection and found no problem, is it a problem with the video card? I decided to open the chassis to check, at the time of taking the video card because the chassis is too small, hand accidentally ran on the Northbridge heatsink (TMD drink I jump, how so hot) my heart wanted, is not the CPU temperature is too high causes, I touched his hand down on the CPU heatsink fan, wow exercise, really hot, but the fans still in turn, how the heat will be enough, but this is the intel original fan of it? Would not be so fake it, try holding the attitude, I went to Computer City to buy a Foxconn fan back! Sure enough, drop a little warm, and the display is no longer shake! I thought the original CPU temperature is too high will also affect the display ah! It seems really can not repair the computer from unilaterally consider ah
39, even computers, 845G motherboard, two 256M memory, P4 CPU. Fault phenomenon: boot Huaping crash. Integrated graphics bad? , With a minimum configuration method, boot or Huaping crash. For a memory, boot OK. It seems that memory or slot? A. Put the memory plugged into another machine OK, that slot? A. When plug memory, the memory of this feeling a lot tighter than the other. Rasp with a small pair of short little memory file ends, mounted on OK.
40, the switch issues: multi-unit computer through the Internet switch, often dropped, then a single main computer normally.
Solution: The original is one of the interfaces of a switch generating circuit. This mouth after all the network cable is not connected properly.
41, some time ago a friend gave a piece of board, just to have on hand CPU (good), then plug in but does not boot, suspected bad board, the latter is unlikely to want, then a replacement method a try and found the problem, the original CPU fan plug is not inserted on board three-pin that is connected to the old hard disk power that the fan, the fan speed can not detect the motherboard, the protection does not boot, another new fan, the problem is solved.
42, failure: once in the repair of "Patriot" out of a loom What's carnival, the boot display information to c4 1.8 cpu while the machine is obviously to see 2.0 how it will be smaller;
Solution: Look good for a moment, the machine chassis to see what all the open jumper no. I saw next to a CPU. And then looked at with instructions on top of the motherboard which was dedicated CPU jumps jumper to its original position in turn checked on a power-OK,
43, failure phenomenon: I own a machine that is running the program crashes (the mouse can not boot move, press the Num Lock key no response).
Solution: suspected virus, anti-virus under DOS, non-toxic. Reset from the start, and sometimes crashes when starting to detect card information, and occasionally start. After the power off from the start, length 1 2 emits short alarm. Remove the card, wipe Goldfinger, the problem is solved. (Graphics cards in question can lead to crashes !!!)
44, one case of strange power failure, said a customer recently a problem with the computer, the computer no time off. The client's home to confirm the customer the problem after boot automatically shut down (irregular). However, the conventional automatic shutdown and encounter except that a conventional computer is suddenly black screen, which has demonstrated the same computer as a similar artificial shutdown, save the first set off, shut down after 30 seconds and then the host automatically turn on the monitor does not bright, hard disk saw light flashes. Initially judged as keyboard failure, replace the keyboard problem is still there; as customers using ADSL USB interface, and therefore suspect the problem of ADSL, ADSL unplug or not; after the final judgment is a power failure, the replacement of a power failure eliminated.
45, failure phenomenon: the computer classroom, 98, turned 98 after each run to interface the crash, and the mouse and keyboard also will die.
Solution: thought it was because of a virus, but after a few with the latest version of antivirus software, the situation remains the same, this time also BIOS to return to a safe state. Then reinstall the system, the situation still did not change, after viewing hardware, still found no problems. Not to ask an administrator, because the original memory on the machine did not, to temporarily equipped with a memory, that memory is not caused by hardware is not compatible with reason. Found a former machine with the memory, after all the normal boot. This question is for professional repair person may not be a problem, but for the average room (especially the school's old room) may often encounter problems such hardware compatibility issues.
46, failure phenomenon: a friend has installed 98 computers with XP dual system, installation 98 normal, but the XP installation to half always able to find some documents, for the N same installation disk does not work, then also with 98 no problem, but then I took him into my office computer, his hard disk installed on my computer installation was successful, but the XP recognize the hardware, hanging back to his machine does not recognize, and then reinstall it, the fault persists.
The cause and solution: I took half a day did not get much time, and finally I really did not mind fresh, and I have not installed when the full computer accessories reinstall back on the computer, install only a part of the normal installation results, later, after many experiments found that three memory on his computer may have an aging did not keep up when reading and writing data or lost files, leaving only two installed on it, the rationale is inserted after the last one installed system on it.
47, failure phenomenon: a friend of a no-name host 693 motherboard, Celeron 400, after a brush with the clean-up inside the case, restart can not enter the system, bios self-test is not passed, suggestive of a hardware failure, then doubt is cleaning the cabinet the interior is likely to touch a loose fitting, then lamb just put all the accessories completely reinstall it again, but restarting the fault persists, replace the method to test all the parts are no problem, my p3550 inserted in his machine the system can also boot into.
Problem Cause and solution: This question puzzled me, because of the time with a friend's machine for too long, the description of what have been gone, only the piece of board in his hand carefully examined and found this Since the motherboard is the no-name, description of the various jumper settings on the motherboard did not how printed on it, with the most experience to figure out the role of the jumper is on the left * ide near the mouth of a row of dip switches do not understand What is the role, so he struck a couple of random, then installed a variety of boards, restart even well into the system, the use of half an hour no problem, although the issue is resolved, but the cause is still Mogao Qing. Then my p3550 plug on his board, also smoothly into the system, as if this was poking the board after a few dip switches automatically restored, so that several switches in the end is what role it once again I stumbled on the restart process, I became p3366 p3550, and suddenly realized that several dip switch is hard overclocking jumper in cleaning the cabinet when the brush may encounter a few switches, the Celeron 400 the FSB to 100mhz, although it can enter into the process of self bios, but can not enter the system, and the reason I plug in the 100 FSB p3550 can go in there. Because they have no motherboard manual, and go online to download the motherboard manual was clear on this method jumper settings, it appears that if the dip switch is useful as a hard jumper motherboard, and then engage in the cleaning process time to pay attention, be careful not to that several movable touch switch.
48, machine failure: boot, show less memory 32M, 128 became 96. Processing: open the case, remove the memory, there is no difference found, the rub memory Goldfinger, restart the fault persists. Open the case again, carefully observe the memory cuttings, protruding inside like a little thing, a small thing to come up with a small piece has been pressed into small pieces of dust from the slot, and then carefully clean up, plug in the memory, the memory 128 back
analysis: It may be the time to clean up the dust to get in the groove, when the plug memory, put him to the bottom, and some cheat when living memory, the memory on a chip (a total of four ) does not work, just less 32.
49, failure phenomenon: a compatible assembly configured to MSI 845E motherboard, Celeron processor 1, 7, 256MDDR kingstone of memory, 40GB hard drive, 52 × CD-ROM drive, usually play the game no problem, because recently stopped a battery, reboot the computer after it is no longer bright! ! Speaker did not sound any error, the computer completely crashes. Display nothing! ! The cause and solution: I replace the law all the plates are inserted into the device tried again, no problem video card, motherboard or does not shine, I suspect that the motherboard burned, so he took the machine from the board split down again with the original power plug it back again, want to try can not light up, or not; I want to find out in the end is what reason, so I changed the power retry, motherboard light, I think that the reason is found, put the power to change the , all the stuff they were loaded back on the machine, can be installed after a try, the machine is not bright, so I will line the front panel of the plug pulled out all the focus on the main board, hey! ! Bright! ! damned! ! ! It turned out to be even electrical reset button on the front panel, but also of my vain busy a pass! ! !