Some time ago, I had a quick look at a 26" sharp. Plug in, wait a few seconds, relay clicks and green LED lights up. Nothing else at all. It was in rather tatty shape, so I pulled the boards and junked it.
Today a pal brought me the 32" equivalent set, with identical fault. I recall problems with touch buttons, so unplugged the lead to the panel, but it still did the same with no response from remote.
I searched here, and found an apparently identical fault reported under LC-32AD5E, with "fault found, F404 O/C".
Needless to say, F404 on both this and the board pulled from the 26" set were OK.
I shall try to get to the bottom of this one, as the set is very tidy, but it does seem to be a common symptom, so has anybody got any suggestions to point me in the right direction.
OldLes