Other then a rash of early LCDs with dead/stuck pixels, their flat panels were never really a problem.
The place I worked for at the time sold tons of the damn things. I only remember servicing two. One that had a Y-C board go out (fixed and returned to service) and my PL-50DHD that stopped responding to IR commands (serial still worked fine). I wound up with the 50, it was my main display for about 5 years. I retired it about a year ago because of no HDMI inputs. Still sitting in my storage.