Sansui AVR Repair needed

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GTiDon

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Hello

I have an older Sansui AVR which after a random time of use around 10 minutes makes a horrible screach and shuts off the speakers,, Then ok for a while after turning off and on again.
Blowing a fan on a heatsink/board near the top through the vents seems to reduce the frequency of the problem.

Is there anybody that can do repairs at a worthwhile cost? obviously this amp is not worth a lot and not worth spending more than its value fixing it.
I am ok with repairing electronics myself too if I can get help troubleshooting the issue from somebody that is knowledgeabile on these amps.. I have already replaced the voltage regulator on the small heatsink that I was cooling, but still have the same issue.

Thanks,
Don
 
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