“This was originally purchased on a whim on eBay in the ’10s: serviced and in 100% working order. (I had a short lived 80s / music phase) It was basically unused, treated & care-taken with respect, & until recently had been protected pretty much untouched in storage for about 10+ yrs — The video here- is the initial play test after storage intended to demonstrate sound.
This was packed/treated with care, and put away in perfect working order to store (climate controlled) a bit over 10 years ago.
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To my limited knowledge from the test, everything appears to still be working great, aside from:
Ch5: open high hat
Ch6: claps
Since they were 100% fine before storage I believe this is just something in need of a tune up, or a little loose wire or oxidation on a wire somewhere — If the sound chips need to be replaced they should be available for $15-$20.