All PC Lights and Fans Are Working, But Monitor Receives No Signal and Keyboard/Mouse Lights Show No Signs Of Power

[Niko327]

Today my pc randomly just shut down while I was playing Valorant, and when i tried turning it on it seems as it turns on, but there is no signal to the monitors or the keyboard, mouse and headset.

So far I know the problem is not in the monitors or the GPU since I swapped the GPU and i still get the same issue. I know it’s not the RAM either because I swapped that too, and still nothing.

Right now I am thinking that it is the PSU or the motherboard, but I am not sure, any help would be really appreciated.

I changed the PSU and the CMOS battery and still nothing.

My specs are
Ryzen 7 3700x
Corsair RAM 3000mhz 16gb (replaced it with a new copy of the same one)
AMD RX 580 (replaced it with 6650XT)
B450M-A motherboard
PSU: I am not sure the brand but it was in a prebuilt

[phillpower2]

I changed the PSU and the CMOS battery and still nothing.

PSU: I am not sure the brand but it was in a prebuilt

What are the brand and model name or number details of the original PSU.

All good brands of PSU have information labels on them and the fact that the one that you have swapped in doesnt + came from a pre built PC suggests that it will be of poor quality and too weak to run a system such as yours.

For older GPUs like those that you mention you need to have a minimum of a true 500W Bronze efficiency rated PSU from either EVGA or Seasonic, if the cards were new a Gold efficiency rated PSU would have been recommended.

[phillpower2]

Being that the OP has revisited the forum but chose not to reply this thread will be closed.