SEGA Genesis White Screen

Model: Launch (Model 1)

Motherboard Revision: VA3

Whenever I turn my Genesis on, it just shows a white screen with no sound or any indication that the game inserted is actually working. This only shows up if I have a cartridge inserted; if it’s not, it shows a black screen, which is normal Genesis behavior. So, I think there might be something wrong with the cartridge port itself, a component that uses the cartridge port, or a motherboard problem (highly unlikely). If it is the second option, I have no idea what component is not working since all of them look perfectly fine. I don’t know what’s wrong at the moment and hopefully you guys can help me narrow this down. Thanks!