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Fixing UMK3 sound problem

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Psychosylph:
I have a UMK3 with a sound problem.  The guy who sold it to me pointed out that 3 or 4 chips (I don't remember the exact number - they're the sound ones U2, U3 and U4 or some such) needed to be reprogrammed and it would work properly.  I have no reason to doubt the seller as he was very honest about the machine and any issues it had.

So, how best/inexpensively to fix it if this is indeed the problem?  Should I find someone to reprogram the chips?  Should I buy a programmer?  Maybe find an old board on ebay or elsewhere and pull the chips?  I'd appreciate any suggestions/links to help me along.

Malenko:
www.hobbyroms.com

stefan is AMAZING.

Did it fail any rom checks?

Psychosylph:
Nope, doesn't fail ROM checks.

Malenko:
could you be more specific on what sounds are giving you problems? If you go into the sound menu does anything not play correctly consistantly?

Psychosylph:
Not at the moment; I'm posting from work.  I've only plugged the speakers in once and they made a horrendous static-y noise that had me unplugging the speakers after only a minute or two.  I don't remember hearing anything recognizable in that amount of time.

Edit:  Just remembered:  The seller told me that sound would work for a while then it would hit a particular sound and file and fail.  He seemed to know that it was a particular sound on one or more of the chips that was corrupted?  -Shrug-

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