Hello, I have recently moved and I took my PC with me. When I tried to turn it on at the new apartment, I noticed it shut off after ~20 seconds, and the display had yet to boot up. I checked in the case, and noticed it was 'clicking' (sound from PSU) off after a certain amount of time, along with a quick flash from the "CPU" debug light.
I checked the CPU chip, the CPU cooler, and all other parts to make sure everything was secure. I unplugged all external cords other than power to test it again. I tested all other outlets, and later even went back to the previous address (where it had previously worked great) and tested it there. All the same result.
After a look on the web, I thought it could be either the PSU or GPU failing, as the wall outlets made no difference. I was skeptical it was the PSU, but this graphics card is pretty low end, so I wouldn't be upset if it just died during the move. I took it out and tested again, and sure enough, the PC stayed on. I thought that meant the GPU must be the problem so I ordered a new one (ASRock Radeon RX 7600 Challenger) and just got it today.
Unfortunately, I got the same result, which means the old GPU must have been fine. I thought to test the PSU by itself with the paper-clip test, and it worked as designed. Thinking the problem might be a short somewhere in the case, I removed it and tested it in a minimal setup (CPU, 1 RAM stick, PSU, with and without GPU) on my desk. I get the same results: with the GPU, it shuts off after ~20 seconds, without, it functions correctly (but no graphics).
The only thing left might be the motherboard, but it is only a year old, and the fact that it works when the GPU is disconnected makes me think it it fine.
I also took a video but not sure how to share it.
Any thoughts?
Specs:
Motherboard: MSI PRO B760M-P (~1 year old)
PSU: Corsair RM850x (ATX, Low-Noise, 80 Plus Gold, Zero RPM) (~2 years old)
RAM: Corsair Vengeance LPX DDR4 (16 GB total) (~1 year old)
CPU: INTEL Core i5-12400F (~1 year old)
GPU: XFX SWFT105 Radeon RX 6400 (~2 years old) or ASRock Radeon RX 7600 Challenger (new)