Commodore 64 Diagnostic Dead Test Cartridge.
Works on all Commodore 64 Models. This is the Cartridge you need if your Commodore Boots up to a Blank Screen Or even if Boots up but still something wrong with it. Identifies exactly what Chip to replace.
Works BOTH on NTSC/PAL Systems.
This is the same Cartridge that was used by Commodore Technicians to repair faulty Commodores. (Takes 20+seconds to boot up)