Panasonic TX-32LZD80

[Turnip]

Hi folks,
Have one where the s/by doesn't fire up, and I've checked all the usual diodes and caps. Thought sort the easy way
so another P/S from Ebay - S/by fired up, but the set didn't turn on. Next thought was the SSB so got one, and the
set still didn't turn on. That only seems to leave the inverter panel, and as they go for five pounds a pop, guess
unlikely - Any thoughts ? - Thanks - Chris.