Hi everybody. I'm having an issue with my Colecovision and thought I'd describe here in case anyone has had a similar issue and resolved it.
I have had this system for probably 20 years and used to play it a lot. It has been a long time since it has been powered on though - possibly as long as 10 years. I tried to play Donkey Kong tonight and here is what it does:
I have everything hooked up right, channel 3 on the TV and system. It doesn't matter if there is a cartridge in the slot or not, it does the same thing either way when switched on. There are some lines in the static (which becomes darker) and a static-y "hissing sound". When I switch off, it just goes to the normal static.
I'm using the same TV/Computer switch that I use for my Atari, and that works fine. The Colecovision was dusty and I cleaned the slot out and dropped a little alcohol in the power switch as well, as I heard being dirty can affect it. But that didn't help. Maybe it needs a new power supply...