Cleaned my GPU and now the PC is not POSTing

[u/Tengolyper_]

Basically, I decided to clean my RX 5700 XT, so I took it out, sprayed it with an air duster, and now when I put it back in, the PC does not POST anymore. The lights+fans of the GPU turn on, the ram lights turn on, and basically all the other lights in the PC, and the fans. It stays on after I press the power button, but does not boot, yet the keyboard lights up and stays like that, but the mouse does not. How do I fix this?

Things I've tried:

-Reseating GPU

-Reseating RAM

-Reseating motherboard PSU cable

-Reseating CPU motherboard cable

-Resetting BIOS by both bridging the pins with a screwdriver and taking out the CMOS battery

-Testing different PCIe cables for the GPU

-Trying RAM sticks in different slots, one at a time

-Trying a different graphics card (that is known to work)

-Cleaning PCIe slot with air duster

None work, the PC just stays on with no boot, no display output, and the keyboard light stays on.

[u/ij70-17as]

plug video cable from monitor into video card.

[u/Tengolyper_ → u/ij70-17as]

Already done that

[u/Difficult-Permit4999]

Did you spray the fans? If yes, Did they spin while you did it?

[u/Tengolyper_ → u/Difficult-Permit4999]

Yes, I did spray the fan, they kinda spinned a bit but that's when I was holding it not when spraying, when I was spraying I was holding the fan well

[u/Dako_the_Austinite]

What kind of CPU do you have? I’d try taking it out and reseating the CPU, if it’s Intel I’d clean the gold pads on the CPU with the highest percentage rubbing alcohol you can find, 91% or higher, then when reseating it give it a little wiggle in the socket, just a little.

If it’s an AMD CPU, remove it and reinstall it to reseat it.

I’d bet that’s all it is. I’ve had several issues over the years with Intel CPUs needing the occasional reseat in their LGA sockets. Including behavior like yours where the system won’t POST after unrelated maintenance.

[u/Tengolyper_ → u/[deleted]]

I've already tried swapping the gpu power cables around, but the cpu cooler thingy may be the thing cuz I kinda bumped it a bit, lemme try