Question PC won’t boot or POST after leaving it off for a few hours

[Gertmcskrrt]

I recently bought a new pc for gaming and the like, and it ran just fine, but after about a month, when i power it on, the lights and fans turn on, but my keyboard and mice shut off and on repeatedly, my monitor shows no input, and the pc itself won’t POST or boot.

I thought maybe it was a power issue, so i just replaced my 550w for a 700w gold, still the same issue.

It also seems to be a bit random sometimes, i’ve tried swapping ram sticks and slots, and it seemed to fix it, but after more testing it didn’t work either way. Nonetheless, it never fails, after leaving it off overnight, it refuses to boot the next morning.

Specs are as follows:
Mobo: asus prime b450m-a
CPU: AMD ryzen 5 3600
GPU: msi geforce rtx 2060
RAM: 2x8GB T-Force Vulcan Z ddr4 3200mHz
PSU: EVGA 700 GD
I also have a 1TB ssd and another 250GB ssd, if that’s important at all

Any help would be greatly appreciated at this point ˊᵕˋ

 

[--SID--]

Motherboard BIOS up to date?

 

[Gertmcskrrt]

Motherboard BIOS up to date?

it wasn’t, updated to latest version and still had the same issue :/

 

[drea.drechsler]

...
Any help would be greatly appreciated at this point ˊᵕˋ

Wouldn't think it an issue with a month-old system but have you tried replacing the CMOS battery?

 

[DSzymborski]

What was the original PSU? It would at least give us some kind of idea if there's a chance that the old one could have damaged your system.

 

[Gertmcskrrt]

What was the original PSU? It would at least give us some kind of idea if there's a chance that the old one could have damaged your system.

original psu was a gigabyte p550b

i’ve replaced the psu, ram sticks, cpu, motherboard, and i even tried different keyboards and mice, still the same issue, completely lost as to what to do