Hi folks, I've got a gremlin somewhere and I could use some second/third/nth opinions.
I bought a Colecovision off a guy today, did a little cleaning, hooked it up, and played all the cartridges to make sure they were working. Everything was cool for about an hour and a half. I took a break, turned the unit off and left the room to work on the controllers since they were in need of some TLC. Came back, plugged in a controller, turned the unit on, and it's dead. No audio or video, regardless of cartridge or none at all. So I took the case apart and noticed right away that a solder joint has come apart. (The one where the wire shield is flattened out and soldered to the top of the metal shield above the circuit board.) As I'm taking it out of the case, another solder joint breaks (up front by the expansion port where the shield is soldered to the strip on the front edge of the board). So I resolder those, put it back together, try again, still nothing. So I'm wondering if the power's gone bad. I just checked the adapter by itself, +5v and -5v seem to be normal but the +12v is only giving me 2.5v. That can't be right, can it?
So...I know it's not a lot to go on, but is it more likely to be the adapter or something on the board? Could I have killed something by resoldering those two spots? Did the board kill the power brick, or vice versa? Should I drop back 15 and punt, walk him and pitch to the rhino, etc?