Can enter the F10 boot (startup items) / F2 (bios), the host prompts only blue light.
Exclusion:
1. Reset the BIOS, and then remove the battery installed;
2. Replace the hard drive, because I have three hard disk system, one by one replacement found the problem still exists;
3. Replace / or removing the memory card slot, leaving only a replacement memory hewn.
Finally, I found a bad memory.