I have a custom built PC (several years old) which does some light hosting. Recently it's been powering itself off, and now it won't even finish loading the O/S before it powers off.
I have tried different PSU, RAM, and HD and it does the same thing so I'm assuming it's MoBo/CPU related. The CPU fan appears to be working fine.
If left on without a bootable drive it doesn not turn off, so it must be related to the increased demands of trying to load the O/S.
Any suggestions to remedy this, or further narrow down the problem component?