Hello, I had problém with my optiplex rebooting in loop, so I disconnected graphics card and ram and connected them back. Now the reboot problém was solved but all colours started appear yellowish or washed out. I cant see clear white anymore. I tried two graphic cards with different pcie slots and the problém remains.

When I use the motherboard vga port the problém dissapears. When I use any graphic card I want the problém is still here. The problém occurs right when I power on the computer, even dell logo is displayed like that.

The problém occurs right afterb I

I dont know what to do. Can you please help me? Thank you very much. Best regards, Michal