Unable to reboot after automatic shutdown

In the process of using a computer, the computer suddenly shuts down. Press the power button after the shutdown, the screen also shows the black, but the computer to the motherboard power supply is normal.

This situation may be due to loose memory caused by the memory pull down after the plug, after the boot failure still exists, but the host did not alarm sound, the elimination of memory problems. Reseat the khaki and replace a problem with the CPU, the failure is still, and no hint of a CPU failure. None of the above, it should be the BIOS has a problem. After the CMOS discharge and then reboot, all normal. Therefore, this failure is due to voltage instability caused by the motherboard BIOS in the data error caused by the restoration of data in the BIOS, the problem is resolved.