XFX Radeon RX 6800 XT GPU.
The GPU was working fine until one day it won’t post.
Put it away in the cupboard for 2 weeks, turned it on before listing for sale - and it works. Played an hour or so - no problems at all.
The following day , system post but no display, but I get the image when I plug my monitor into the output on the motherboard. Re-install AMd drivers, restart a few times, it works again.
Then, 2 days later - no post again.
I am not sure what is going on there so hopefully someone can figure it out.
Selling for parts or repairs so no returns.