Monitor or GPU help

[[TC-R] Luke]

Have you tried a different monitor like a small tv or something? Just to see whether it is your monitor or not,
When I did some research on it as I had a similar issue a long time a go my GPU just needed a power reset.

This basically drains all the power in the circuit (apart from the bios chip)

You can try this by unplugging everything then press the power button 2-3 times to remove any current from the computer then replug Everthing in and see if that worked.

Its simple and basic but in most cases and in my case it worked fine

If it didn't work and it did the same thing on a different monitor it might be your GPU