If you're switching the cartridge leads and the Fozgometer shows the levels switch as well then there's no doubt that both of your cartridges have a faulty channel. It has to be that as there's nothing else connected.
I'd go with Vegasears suggestion. Or borrow a cartridge from somewhere...?
Good luck!
I'd go with Vegasears suggestion. Or borrow a cartridge from somewhere...?
Good luck!