The system often freezes for no reason

After years of computer use, there has been no failure, but once the boot, the optical drive LED light, tray can not eject, the monitor does not have any display, the computer can not start, but a few minutes after the system returned to normal. Then, this phenomenon repeats itself.

1. Use anti-virus software to scan the system, or reinstall the operating system, if the failure persists, you can determine the hardware failure.

2. Use the replacement method to replace the main parts of the computer, and found that the problem appears on the motherboard.

3. Carefully check the motherboard, you can find the CPU socket next to the electrolytic capacitor slightly puffed up, you can go to a professional repair department to replace the capacitor, the system can work properly.