Ask for advice to solve their computer suddenly shut down the run-time fault

Users questions: My computer recently in use, the sudden shutdown of their own. I followed the boot but can not start. At this point looking at the keyboard lights are still bright, but the mouse does not light. After about a minute can boot up. Please advise how to troubleshoot. Thank
Experts answer: a possible bad CPU fan, computer self-protection function 2 Possible bad power supply, voltage supply enough apart to see if the chassis fan status, or CMOS view the CPU temperature, higher than 55 degrees are a problem, another good one fan
  • This information provided by the users.Thanks!