RX 6600 No Display After Crash and Automatic System Restart

I was playing a game on my PC when it suddenly went black and automatically restarted. At first, it booted back to normal. The second time it happened, there was no display after restarting, so I plugged my monitor into my motherboard instead (I’m using an R5 5600G CPU). I saw Code 43 on the RX 6600 in Device Manager, so I used DDU and reinstalled the GPU driver. After doing that, the warning disappeared.

Afterwards, I was able to play Valorant for about an hour, but then the screen went black and the system restarted again. I tried installing an older driver for the RX 6600, but I still experienced the same issue.

Now my PC powers on, but there is no display from the GPU. However, the system itself seems to be running (pressing NumLock turns the light on and off).

Has anyone experienced this or knows how to fix it? Thanks.