I've got an Intellivision I with a faulty Rev. B motherboard, and I've made it a project to try to fix it. This console was taken good care of, and one day in the 90's it powered on with a black screen.
When I press Reset with a game cartridge inserted, I usually get momentary vertical white bars. Sometimes I get a flash of solid color screen. Never sound or anything else. I managed to snap a photo of the bars:
Interestingly, when I insert my LTO Flash! cartridge and power on, the whit
I replaced the two transistors Q1 and Q2 and everything works. I don't know whether one or both were faulty, as I replaced both before testing, but in the end the problem turned out to be two small parts that cost less than a gumball.
Yes, this console was "the one" I bought myself after graduating from college and getting a few paychecks. And it looks like a museum piece, so the darned thing needed to work. And now it does, so all is good. Plus it also has new capacitors from m