PC won't turn on

Henryvotril · March 21, 2021

Hey guys!
Last night I went to sleep and turned my PC off like I always do, and woke up today and it won't turn on. Here's what I noticed:
-If RAM stick is installed, the CPU and PSU fans will go on for a second and then turn off;

-If I hold the power button they'll remain on for a couple more seconds but then die anyways;

-If I remove my RAM stick or the ATX cable from the motherboard, CPU and PSU fans will be on for like 5 seconds with no drive activity, turn off, then turn on again and remain on with no activity until I turn the PC off myself;

-Unplugged SSD and GPU to see if they were the problem, they're not.
-I don't get video signal with or without the RAM stick installed, also tried with and without the GPU installed (my processor has an iGPU) and still I never get video;

-I've unplugged and plugged all of the cables and hardware to be sure they're not just loose;
-Tried dusting the mobo RAM slot and the gold fingers, didn't work;

-Tried taking out the mobo battery for a minute, CPU and PSU fans turned on but I still didn't get video or any activity from the drive, tried turning PC off and on and I got back to having them turn on for 1 second and then dying again.

I bought a new RAM stick right away 'cause I immediately thought that it's the RAM for sure, but now I'm not quite so sure.
Could it actually be the PSU not being able to supply enough power, and therefore dying when RAM is installed? I don't have another PC to test the RAM or the PSU, and 'cause of the pandemic I'm not comfortable going to a store to get it checked either. I just need some external perspective to not end up buying a new RAM for nothing when I can still cancel the order.

Tested hardware:
AMD Ryzen 3 2200G PRO

HyperX Fury 8GB 2666MHz HX426C16FB3/8
ASRock A320M-HD (BIOS 5.40)

SSD PNY CS900
PSU Wisecase 500W FNWD0005

Thank you in advance!

MrMcMuffinJr · March 21, 2021

Lets do a quick and dirty test. completely unplug all PSU cables and set them aside. find a paperclip or some kind of wire stripped on both ends. on the 24-pin power cable there should be a green wire. This wire is the PSU_ON wire. bridge that wire and any black COMMON wire. this will tell the PSU to turn on. PLEASE TAKE CARE AS TO ONLY BRIDGE GREEN AND BLACK. I would prefer if you didn't get electrocuted. When you bridge the wires, the fan on the PSU should start spinning continuously. is the PSU is dead and causing system to shutoff, the fan would turn off after a few seconds like the system did.