If you are concerned, take the top off and look for puffed out or leaking Caps. If you see something, get it fixed. If you don’t, you’re probably good to go.
All the best.
Sansui AU-717
Bought my AU-717 integrated amp new in 1977. Have used it intermittently over the years and it works and sounds great, 45 years later. The cover has never been off and I still have the owners manual. Any reason to have it serviced? Caps, etc? If so, why? And can you recommend a knowledgeable service resource in the Atlanta area?
I generally live by the “if it ain’t broke, don’t fix it” philosophy but suspect that may not apply here.