Help: PC not posting

Kangaroo2K · July 9, 2023

Hi there

After not using my PC for 5 days it randomly shut off after about 1 hour of use.

Now, when I turn on my PSU, the motherboard's RGB will turn on as normal. When I press the power button, it'll light up and stay lit indefinitely. The fans spin up for about a second, however immediately turn off again. None of the POST LEDs light up. It doesn't fully power off after, either. It's basically fully powered off except for the power button light stays lit and the button doesn't do anything upon pressing the button until I turn the PSU off and on.

In addition, on the same evening, I might have broken some of my RAM. I was really sleep deprived and tried to test if the RAM was the problem. After that, I haven't attempted anything further.

The system is about a year old:

CPU: AMD Ryzen 5 5600X
Motherboard: ASUS PRIME X570-PRO
RAM: CORSAIR VENGEANCE RGB PRO SL (DDR4, 3600MHz, CL18, 4x16GB)
GPU: GIGABYTE GeForce RTX 3080 VISION OC 10G
Case: CORSAIR 4000D AIRFLOW
Storage: 1TB Samsung 980 Pro, 2TB Samsung 980 Pro
PSU: CORSAIR RM750x (750 Watt, 80+ Gold)
Cooling: CORSAIR iCue H150i ELITE CAPELLIX
Operating System: Windows 10 Pro 64 Bit

If you need more details that will help solve this issue, I'll gladly provide.

Edit 1:

Whenever i pressed the power button my PSU would click once and then click again when I shut down my PC. I noticed that now the PSU clicks twice in quick succession.

I reset the BIOS.

Edited July 11, 2023 by Kangaroo2K

Sjaakie · July 10, 2023

Reset the bios. Are you getting blue screens? 3600 mhz is pretty ambitous at 4 sticks ryzen 5000. Run it at default / non-docp until the problem is solved.

Kangaroo2K · July 10, 2023

13 hours ago, Sjaakie said:

Reset the bios. Are you getting blue screens? 3600 mhz is pretty ambitous at 4 sticks ryzen 5000. Run it at default / non-docp until the problem is solved.

The problem is that my PC doesn't POST at all. I can't even get to the BIOS. Do you have any further suggestions?

Sjaakie · July 10, 2023

7 hours ago, Kangaroo2K said:

The problem is that my PC doesn't POST at all. I can't even get to the BIOS. Do you have any further suggestions?

Reset the bios / cmos by shorting the pins on the motherboard. Check the motherboard manual for the exact location.

Kangaroo2K · July 11, 2023

22 hours ago, Sjaakie said:

Reset the bios / cmos by shorting the pins on the motherboard. Check the motherboard manual for the exact location.

I reset the BIOS and my PC still doesn't POST. But I noticed that the PSU makes a double clicking sound when I press the power button. I'm guessing that it's turning on, noticing a fault and turning off. What do you think?