I just gotta ask
In the photo, is that the gunk from the capacitors ?
or the horrible crusty barbequed glue used to secure them to the board?
or a combo of both the leaked gunk and glue ?
I ask because I have removed old but good capacitors that were shorting on the board
due to the glue bridging the contacts at random via temperature drifts
fwiw the cleaned up old Rubycon caps tested just as good as the new ones, and were not leaking,
just the multicoloured glue was at fault, and made them appear leaky.
I cleaned up similar units with same problems, and they performed fine once the old caps were cleaned up and re-soldered
An experiment that seems to have paid off, as no replacement caps to order in, or comebacks... yet