Donkey Kong freezes up

frytex

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Mar 25, 2008
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La Vernia, Texas
Trying to figure this out for awhile now, my Donkey Kong freezes up everytime it is left in attract mode and always at the same spot. Once it shows donkey Kong with his name below him it freezes up, When I coin it up before it gets to that screen it will play and not freeze up until I allow it to go back to attrack mode, It is the 4 board set and I have replaced 5F and 5K but still no help, Please let me know if you have the same issue or seen this issue before.
 
The most likely problem is one of the program roms has slipped a bit, D.K. doesn't do any diagnostics during boot so the only way to find out is to either pull and verify the eproms or substitute with another set, the program roms are the four on the cpu board, the next likely suspect would be a ram chip that has a bad bit that is only used during the attract sequence. Verifying the roms isn't foolproof, I have found on occasion that roms may verify but still not run correctly, I usually re-burn the image over the present rom so that if it just bit rot starting the image will be refreshed, I've found more than a couple of D.K. sets that just need to be reburned when they begin to give intermittent problems.
Dick
 
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