I left my pc open last night. When I woke up, I noticed that it's not responding (I'm not sure if it was on or off when I woke up). Pressed the power button - and the lights turned on but nothing appeared on the screen (fans weren't working).
I opened my computer box and disconnected the power supply from the motherboard, removed RAM cards, disconnected the hardrives and removed the small motherboard battery. Cleaned my computer from dust with a fan and reconnected everything.
The computers lights and fans were working fine but it now turns off every like, 5 seconds, nothing appear on the screen. I tried moving the RAM cards to different slots, removing and inserting the motherboard (GA-B75M-D3V) battery a few times... disconnected the power supply cables from the motherboard. Still that same problem. What might be the problem?
91 Answer
On BIOS Setup you should check CPU temperature. By default motherboards are configured for shutdown when a defined CPU temperature limit is reached.
You could find some reference here: CPU Temperature required for auto-shutdown
Sometimes when the computer has been off for a long time this period (5 seconds) tends to be longer.
This two videos could give you some guidance in this issue:
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