PAL N64 Displaying Weird Colours

Hello

My unmodded PAL N64 was working fine on my Sony Trinitron last year via an S-Video Cable and Scart Adapter purchased from Console Goods.

I’ve set it up this week and have ran into an issue.

The graphics are unplayably dark with strange inverted colours when the TV is set to standard AV mode and when set to RGB, the picture is crystal clear but all red! I know a PAL N64 can’t display RGB without a Mod but i was frustrated by how good the picture looks. Much better than the photo conveys.

I’ve bought another cable and Scart adapter, tried different games, cleaned cartridge slot and games with rubbing alcohol/cotton bud sticks. I hooked it up via RF and via composite cables. And also hooked it up to my Samsung 4K tv via composite.

Still the same

The dark AV image

The Red RGB image