So I stumbled across the repair tips posted by Tom66 and was able to get a quick high level understanding of Plasma panel technology (my TC-P65VT25 broke). I ordered a new Y-drive (lower) "SD" card on 11 Oct 24 for it based on the stated+implied+inferred knowledge he shared. I'm a MSEE so I had a little existing background to help but that was 1996 :p

I thought I should subscribe to just say thanks (plus it's a pretty rich forum).

Picture of symptom attached.
Be well