World Class Service Super Nintendo Tester

This is a rare box used by World Class Service and repair centers to test Super Nintendo systems. It plugs into the cart slot and has cables to both controller ports and the video port. When powered up the software in the tester checks video signals, clock timing, internal memory, and controller data. After that it runs a series of tests like sprite mirroring, scaling, transparency, and music channels. The entire sequence runs about 2 minutes. The box itself has Super Famicom labelled on to...