My nephew's computer...
He left it on, went to work, and the computer went to sleep. To wake it back up, he hit the power button, and nothing happened. He flipped the switch on the back, on and off and hit the button again and nothing happened. He went and bought a brand new power supply. Connected it, and nothing happened again. We found out the case wire directly behind the power button became detached. We used another case and the system worked great with no issues of any kind for many hours. He came home from work today and now the computer won't turn on with the old and new PSU. some fans start, the keyboard lights up and then everything shuts off again. We unplugged everything and back in again, checked all connections inside and out, made sure the power switch cables and all the others were plugged into the JFP headers correctly, checked the CMOS battery, RAM sticks (never removed when moving from 1 case to the other.) No beeps of any kind.
Would this be a motherboard issue or something else? Would clearing the CMOS settings/BIOS settings/NVRAM help?
Motherboard is a MSI Z87-G45
EDIT: Windows 10 Home
EDIT: We took the CMOS battery out for 2 minutes and put it back in, nothing.
Edited by heartgrave, 23 March 2018 - 05:57 PM.