I picked up a second CV that was not functioning to see if I could get it working. I tested the PSU and all the voltages were good, so next I hooked the system up to the TV to see what would happen. I got a really nice black screen, but no text. I assumed that the power switch was really dirty and took it apart (It was really dirty). However after reassembling it still only displayed a black screen. I got out the multi-meter and tested at the switch to see if I was getting good power. Found that with the switch on or off I had great +12, however with the switch on the +5 dropped to +2. I used the psu from my other system and everything works perfectly. I assume that there is something wrong with the PSU on the +5 side.
Does anybody have any experience with repairing the coleco vision PSU? Is it worth trying? Any advice would be appreciated.