Chosen Solution

I recently decided to get out an old PAL super for my son to play on as some family fun. A few cartridges don’t seem to be working/recognised, I’ve swabbed the cartridge with a cotton tip but nothing of the game visible only a fuzzy black and white screen. Any direction would be a appreciated. Quite capable of handling repairs.

Probably the battery on the game card is dead. Open it up and try swapping it.