Panasonic TX-32LMD70 - P/S problem ?

[Turnip]

Hi folks,

Had a couple in recently where cust says they don't turn on at times, and suspect it's the on/off switch, as they always do.

So far I've found the sets work OK but feel there's something lurking - maybe it leads to the fave failure of
F9222L-F219 chip - Any thoughts ? - Thanks, Chris.