If your power board was not resoldered to the extent needed to totally remedy this problem, that would explain that problem reoccurring. All the solder connections
except a few tiny predictable exceptions have to be resoldered on that board, which means 99% of the board. If anything less than 99% of the board was resoldered, you have your answer.
When I resolder a PS board from that series, I give you a lifetime warranty on that work. This would not have happened if I had resoldered it. If it did, you would be able to send it back to me and have it redone, no charge.
Sounds like you are having a recurrence, as disappearance of the picture is one of the symptoms of the bad soldering job Pioneer did on those PS boards as factory issue. I have remedied that one at least 7 times now, 100% of the time it has occurred in the boards I have been sent. Of all the many dozens I have resoldered over the last 7 years.
Or you may have a totally new problem, that needs to be addressed on its own. No telling right now, from the current data that you wrote in. But there's a fairly high likelihood of recurrence of new cold solder joints maturing and rearing their ugly heads, rather than this being a new problem.
Here's a copy of something I just put up on the master thread about that issue, which you can find here -http://www.avsforum.com/avs-vb/showt...402397&page=92
The latest, from last week. This board was an accident waiting to happen.
Notice the pair of solder joints about to go bad on the left of the pic at upside down "R218", to the left of the really bad one at "L219". Both ends of resistor 218 have the telltale "halo" around the leg that eventually turns into the very obvious one on the right at L219. While that pair of halos at R218 is looking very innocent right now, it's only a matter of time before the on/off-heat up/cool down-expand/contract cycles of normal operation cause those halos to get cut deeper and deeper into the solder they are in, until both of them "go 360" like the circle of complete non-connection that's so very garishly apparent in the one to the right at L219.
Plus the one just at the edge of the shadow and the one just below that, in the string of pin connections to the right:
And for those of you wondering if I am still doing this, yes I am. Keep sending me your boards and I'll keep your big screens working.