Sounds like the common failure. On a side note, if anyone ever has one they're just going to toss out, I would like to get a hold it and try to reflow the joints but I have never seen the guts of one in person so there's always the chance I'll do more harm than good LOL. I was a weapon spec and aviation certified solderer for many years and worked on this kind of failure almost daily. I can also rework our power window switches when they fail from the same thing (also a common fail) and fix them permanently.