Bibin
Frequent Poster
A quick tip for those of you with old 80's dedicated arcade games. If your game isn't responding to input, has odd video, or won't boot, you should probably clean the edge connector. It's a bother with these though, so here's a tutorial.
Open up the back of your machine, and look for your board. It'll be MASSIVE (pictured is Atari Dig-Dug), and will slide out. Slide it out a bit and gently disconnect the plug from the board. Slide it out further.
Be sure to support it on the LONG sides on the edges, as being large it WILL flex which is bad for it.
Lay it down on a clean surface, like so.
Look around for smudges, leaking capacitors or backup batteries, burnt out chips, "goo" between chip legs, dust, etc. Use rubbing alchohol to clean off the board, and make sure it's shiny. If you find broken traces, it's easy to fix them, as commonly there is nothing covering them. Just solder a bridge as you normally would.
For the edgecard, use rubbing alcohol, and if you need to, lightly scrap on them with a metal tool (so lightly, do not mess them up!) to expose fresh metal. If you see any burnt out pins (like on mine), don't fret, as they might be redundant (the one on mine is identical to another one, so it's okay.) You should still clean it, as resistance caused the burn in the first place.
After all this, put it back in, and plug it in.
Mine was booting fine, but would not coin up reliably and the controls cut out sometimes. Works great now! Next episode: monitor fixing.
Open up the back of your machine, and look for your board. It'll be MASSIVE (pictured is Atari Dig-Dug), and will slide out. Slide it out a bit and gently disconnect the plug from the board. Slide it out further.

Be sure to support it on the LONG sides on the edges, as being large it WILL flex which is bad for it.
Lay it down on a clean surface, like so.

Look around for smudges, leaking capacitors or backup batteries, burnt out chips, "goo" between chip legs, dust, etc. Use rubbing alchohol to clean off the board, and make sure it's shiny. If you find broken traces, it's easy to fix them, as commonly there is nothing covering them. Just solder a bridge as you normally would.
For the edgecard, use rubbing alcohol, and if you need to, lightly scrap on them with a metal tool (so lightly, do not mess them up!) to expose fresh metal. If you see any burnt out pins (like on mine), don't fret, as they might be redundant (the one on mine is identical to another one, so it's okay.) You should still clean it, as resistance caused the burn in the first place.
After all this, put it back in, and plug it in.

Mine was booting fine, but would not coin up reliably and the controls cut out sometimes. Works great now! Next episode: monitor fixing.