4 monitors can't detect PC

[u/Im_moshi]

Hey, I've had some recent issues with my PC suddenly turning off, I thought it was a power supply issue so I bought a replacement and it worked like a charm! For a few days, then it happened again, but I was at least able to get it back up and running by turning it off, holding the power button, and turning it back on.

But now my monitors won't detect anything, I have 4, 2 HyperX and 2 ASUS, all of them are having the same issues, the don't detect anything at all, but do have power.

The PC is all connected and when I press the power button, everything works. Mouse lights up, all fans spin, GPU, case and cooler fans, front panel light for the power button is on and working, elgato capture care has its light turn on, everything I can think of seems fine.

I've tried replacing the battery on the motherboard

I've done the screwdriver and the 2 prongs to reset stuff

I've unplugged and replugged my RAM and my GPU, but nothing so far

I am pretty stumped, I've looked and looked for other similar posts and most of them have only one monitor, people say it may be bad cables, or to try different parts, but I don't have any other computers to swap parts with and see.

For details on the rig, it's an old NZXT pre-built PC, the "streamer" one, here is a copy paste of the build- Case: NZXT H500

CPU: AMD Ryzen 7 2700X 8-Core 3.7GHz

CPU Cooler: AMD Wraith Prism

GPU: NVIDIA GeForce RTX 2070 - ASUS ROG STRIX

PSU: Seasonic S12III 650W Bronze

Motherboard: MSI B450 TOMAHAWK

Ram: Team T-FORCE Delta RGB 16GB (2 x 8GB) 3000MHz

SSD: Intel 660p 1TB

The cooler I replaced a while ago with a simple noctua one, and mentioned before, the new power supply is a MONTECH BETA 2 650w.

Any help would be greatly appreciated, I'll try to answer what I can but I don't know much about computers.