Arcadenut
Well-known member
Ok, it was started over here:
http://forums.arcade-museum.com/showthread.php?t=172683
But this is a more appropriate place for the repair of the game.
History so far:
Any ideas on what to look at next?
http://forums.arcade-museum.com/showthread.php?t=172683
But this is a more appropriate place for the repair of the game.
History so far:
- Jawn picked up a Defender for $50 that "Worked before I moved it".
- He brought the game over here, game gets bad rug, 4 solid lights and hangs at the end of the rug pattern.
- Move the Ribbon cable, game boots to a better rug then reports a RAM error.
- Replace 9 RAMS, game boots into Book Keeping.
- Game won't leave book keeping, so I replace the 5101 and the 4071. Same results.
- I can advance backwards to Function 28, then forward. The book keeping screen flashes a couple times then goes back to Function 1.
- I did the Lithium Battery mod (Sorry Jawn), and that didn't help either.
- Replaced the 4 big caps on the board (one looked bad), no change.
- Watched the RESET line on the CPU and cycled through the book keeping. The CPU was NOT reset when it went back to the book keeping menu.
- Tried two different ROM boards and I get the same results.
Any ideas on what to look at next?
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