My SX-737 was like that. Fix one thing and another one would pop up. about 1/2 way thru the unit I figure it would be cheaper to shotgun the whole thing at that point. Ended up being about $20. cheaper that way than one board of parts at a time plus shipping.
My 550-T is sitting waiting on an alignment for the same reasons. It's been totally recapped, and the RF/IF sections peaked. But the MPX board is so FUBAR'ed, it's unreal. Someone got in there and really went to town on the coil towers. They are all out of adjustment, and I mean really out!!! Dave's gonna have his hands full with this one.