Originally Posted by midnightmadman29
I have been having the same half black screen. I tried getting philips to cover the problem with no luck.
My first thoughts were that it was somehow overheating. I though this because it started when the temp. was very hot, mid july and the ac was off. Now it is still doing it even when the temp has cooled..
I read so much about this my head is spinning. One thing I am wondering is if this started when I did a firmware upgrade back in july. I was having a seprate problem. The tv was mixing the av signals together when the tv was powered up. The only way to clear that was to change the channel to a HD channel.
I just read the posts about the techs tapping on the speaker area.
I tried doing it while the picture was normal. I saw the bottom half of the screen flicker for an instant black and then it went back to normal.
I also switched the picture setting to echo. I never found out what that is supposed to do to fix it, but I figured its worth a try.
Next idea is to roll back my firmware.
Something else that was strage was when my half black screen appears, if I hit the menu button on the tv it slowly dissolves...and then goes black again. It will go back for a few more times. then stay black for a min. and then sometimes,(not always) go back to a normal picture...
My set occasionally has a problem with the bottom half of the screen. It usually goes black for a few seconds, recovers for a few seconds, and repeats the cycle. Sometimes it stops doing it within a minute or so.
The problem first occurred on a very hot day this summer, with no A/C. It usually does not happen until the set has been on at least an hour. Sometimes the set will be on for several hours without doing it. I would guess that the set is typically on for 1-3 hours a day, and I think I observe the problem about once or twice a week.
When the cycle did not stop on its own, I have gotten it to clear by tapping near the LEDs(I think I tried this about 5 times, and it always worked). I have also gotten it to clear by powering down for a few seconds, and powering back up(I think I tried this twice, and it always worked).
It is difficult to figure out what would act like this. A poor solder joint could fail with temperature, and temporarily go away after tapping, but I would not expect it to clear itself quickly on its own or go away because of a very brief power down. Maybe the tapping causes a relay to bounce, which has the same effect as the power down. At this point, I really do not have a solid theory.
FYI, I am still running firmware version 1.0.8