I'd recommend to check all the electrolytics in the set with an ESR
meter. I do so always when I have to repair a many years old device
and the cap test has not been done within years. There are often found
some "stray bad caps", and they sometimes cause mystic semiconductor
failures etc. It might take a half an hour or so to test all the
electrolytics, but it gives a far lower chance of failure in near
future.

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