It is rare I need to solicit help from the community, but it's good to know I can at least ask.
I bought a Video Game Brain on eBay after receiving assurance from the seller it worked. Alas, it does not. Opening the cartridge revealed a disconnected wire but I'm hesitant to fiddle with it without a schematic. Have any of you ever opened one of these, or have a wiring diagram for it? The seller has agreed to refund if I return it but I'd really rather get it working.
Any suggestions will be much appreciated.