Question PC turns on for a second and then shuts off, and won't turn back on ?

[Roboticdork]

So this started recently where every time i flip the switch on my PSU or press the power button, my desktop PC will boot for a second and then turn off and no matter what i do it won't stay on. i tried making sure my cpu block is making full contact, i made sure my AIO was plugged in the right headers, I even checked for any loose cables and still nothing.

I don't know if this will help/matter but the CPU light on my motherboard always shows solid red, indicating there's something wrong with the CPU.

Specs:
Motherboard: msi mpg z790 edge ti max
CPU: i3-12100f
CPU cooler: it was an intel stock fan but i upgraded to a deepcool LT720 aio
GPU: radeon 7900xt.
RAM: corsair dominator DDR5 64gb
PSU: evga supernova 1000w gt
Case: phanteks eclipse G500A

 

[Lutfij]

You might want to remove all mounting pressure from the CPU's cooling block assembly while the PC is lying flat on it's side, so the AIO's block is merely resting on the CPU's IHS. See if that helps alleviate the issue.

Might want to inspect your CPU's socket for any bent or broken pins.