"it depends" is going to be the answer, though the actual one probably is not a great answer to the main question.
That sounds more like a contact issue which you can probably sort yourself, and certainly worth trying to. In an ideal world you would have a nice IPA, contact cleaner and scrubbing option for it (fibreglass pens are not that expensive -- sometimes the sell them to clean tile grout with in hardware shops, I found one in a modelling shop a while back) but a cotton bud and some kind of solvent (careful you don't melt the plastic/do a little test first) or some contact cleaner (don't get the automotive one).
Dedicated shops for it is not something I have ever seen. I am sure whatever component level repair shop around you will be able to wave a hot air station over it to do a reflow if that is a thing (could be, has fixed some things for people and many are of a design). Parts replacement likely not -- most chips got very hard to find for the original makers (why many are no longer made or got new versions) and might also need to be programmed with code nobody has, and it is unlikely to be basic passives.