Coleco expansion mod 1(2600)

[Chunky]

i cleaned the world out of the connector and cartridge slots on both sides of this. Put in any 2600 game and it stays on for 3 seconds then blank screen.

no cartridge makes the normal atari no cartridge bars, insert a cartridge and it looks perfect, you can start playing is your quick, 3 seconds later, it's outta there!

any ideas? leaning twords it being a cap or something(think it charges up and blah, i don't know)

[omnedon]

Other "easy" stuff I'd try, before checking the PCB out...the buttons. Take the cover off, take the glamour caps off the buttons, and clean 'em best you can. A button "could" be stuck down. that might do it. The 2600 does have weird programming, so maybe you can get 3 seconds out with a certian button pressed down.

I'd try that first. Let us know how it goes. I love to learn new fixes, as I may very well run up against one doing what yours does!

Good Luck!