Booted and installed W10 - Now not posting?

[weak bronze]

Built a new PC for my gf. I had windows installed and was running games as benchmarks, then it sat unplugged for a week on my desk while we set up her desk. Went to go set up the desk and now the PC wont post.

Monitor and hdmi have been verified. I have tried 3 different GPU's at this point. I've also unplugged and re-plugged in everything that can be. Reseated and thermal pasted the cpu. Cleared cmos battery. I'm at a loss at what could have happened. I took the mobo out and visually checked for any damage and there is none. All lights and fans come on and it appears to run, but I don't get the POST beep and it wont display anything.

CPU: AMD Ryzen 5 5600x
MoBo: Gigabyte B550m Micro- ATX Aorus Elite
Cooler: Stock
Storage: Crucial P3 1tb m.2
Memory: Kingston Fury Beast 16gb DDR4 3200
GPU: EVGA 1080ti/MSI R9 390/ GB aurus 3060ti
PSU: Thermaltake Smart Series 500w

[pastel crater]

Couldn't help but notice that you've used cards that are rated to be ran with a 600W PSU. Is it possible to try a different PSU and see if that solves the issue?

500W might have worked initially but probably broke the PCI-E power rail since all GPUs were rated for a higher capacity PSU

@weak bronze

[weak bronze]

ya know, thats a very valid point. I didn't even think of that. Good Call.

@pastel crater What would be the course of action in that case? just a new PSU or new mobo?

[pastel crater]

Umm, are you able to use the PSU in your own PC to confirm? If it boots up just fine then it's just a new PSU and you're done.

You would have to replace the PSU anyway with any of those cards, so a new PSU is a must have on the shopping list.

But I wouldn't consider replacing the motherboard just yet, if you got lucky it's just the PSU that gave up the ghost.

[weak bronze]

I am not, its a bit underpowered for my rig. (10700k, 240aio, 3060ti) I'll see if i can return the PSU and give it a shot