It could be any of a number of things given the advanced age of the system -- bad cold solder joint somewhere would be prime among them.
You will also find these selling for $100-150 used, complete and working -- compare the prices on Ebay, etc. for complete systems (which then gives you a set of parts like the power supply, etc. to keep in reserve).
Maxd1
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Posted November 24th, 2025 02:03
Worth a try. https://www.youtube.com/watch?v=AyYdPCGv6LA