We recently purchased a CONN Minuet electric organ 540 from a thrift store. The lights all come on in the back but there is no sound. Any ideas on what we might want to look at first?
If you mean vacuum tubes istead of "lights" be aware that just because they light up doesn't mean they work.
MANY of them LIKELY are dual ones with two sections that both must be lit to work.
The starting point is to check power supply voltages.
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