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Red line across the entire screen of my sony 55" grand wega kdf55655

Redskin Mike
11-29-2007, 05:01 PM
I think I have a unique problem here. I had a power outage a few months ago. It only lasted a second or so before coming back on. When it did come back on there were red lines approx. 1/4" wide from side to side , top to bottom across the entire screen. After turning it off for a few hours it "reset" itself. No problem for months.
One day I accidentally cut the tv off and without thinking cut it back on before it had a chance to completely power down. Once again.. red lines. After unplugging it for 7 hours or so .. lines gone. It seems now that it became more sensitive so that even if you turned it off for an hour the red linescame back with the picture in the background. I blame myself of course for the instant on events..obviously wont happen again.
I unplugged it.. put it in another room for a week until a sony auth. repair center could pick it up and guess what. Not only couldn't we get the set to duplicate the problem at home before they took it.. they can't get it to do so at the shop. I did alot of net surfing and never could find my problem described. I am not savvy enough to have found a site such as this until now.. any suggestions? One other comment.. is it possible for the surround sound system I have .. including a serious powered subwoofer have anything to do with this?
When I think of this I have a subwoofer on one side.. 2 nice speakers above right and left..and a center channel below the tv. Also the audio rack is right beside the set. Sorry so winded but this set is 3 1/2 years old and has a beautiful picture otherwise and I am lost!!!

daleb
11-29-2007, 05:49 PM
Might try www.agoraquest.com
It's a forum specializing only in Sony products.
Another more generalized website with several very competent tech people is http://www.keohi.com/keohihdtv/
Rear Projection section of avsforum is another worth checking out.
Someone may have run across this before. Good luck!

edders
11-29-2007, 09:27 PM
Not sure what the nature of your Sony's problem is, but doubt it is your home theater. Just a guess, but sounds like some ic is having intermittent problems. If it is still at the shop, ask them to make sure all plug in modules and components are making proper contact, re-seat them. It could also be a component just failing.

Ed in Sacramento

tipstir
11-29-2007, 09:42 PM
I think I have a unique problem here. I had a power outage a few months ago. It only lasted a second or so before coming back on. When it did come back on there were red lines approx. 1/4" wide from side to side , top to bottom across the entire screen. After turning it off for a few hours it "reset" itself. No problem for months.
One day I accidentally cut the tv off and without thinking cut it back on before it had a chance to completely power down. Once again.. red lines. After unplugging it for 7 hours or so .. lines gone. It seems now that it became more sensitive so that even if you turned it off for an hour the red linescame back with the picture in the background. I blame myself of course for the instant on events..obviously wont happen again.
I unplugged it.. put it in another room for a week until a sony auth. repair center could pick it up and guess what. Not only couldn't we get the set to duplicate the problem at home before they took it.. they can't get it to do so at the shop. I did alot of net surfing and never could find my problem described. I am not savvy enough to have found a site such as this until now.. any suggestions? One other comment.. is it possible for the surround sound system I have .. including a serious powered subwoofer have anything to do with this?
When I think of this I have a subwoofer on one side.. 2 nice speakers above right and left..and a center channel below the tv. Also the audio rack is right beside the set. Sorry so winded but this set is 3 1/2 years old and has a beautiful picture otherwise and I am lost!!!


I've seen this in laptops LCD panels too.. You would need to have the set check out. Panel could be damage or the the inverter and it needs to be replaced.

daleb
11-29-2007, 10:17 PM
I've seen this in laptops LCD panels too.. You would need to have the set check out. Panel could be damage or the the inverter and it needs to be replaced.

You can't really equate an LCD screen in a laptop with a LCD rear projection display. Granted, they both use LCD panels but in a totally different architecture. The TV display is similar to this Panasonic LCD rear projection set:

http://i.cmpnet.com/eet/news/05/05/DC1372_TEARDOWN_PG_70.gif

(I've replaced the inverter in a laptop too.. I still have new backlight for a Sony laptop, because after disassembling it turned out to just be a bad connection).
Sorry to digress:
I have the same display (KDF-55WF655) the OP is discussing, and while board re-setting can not hurt, a defective board or optic block are much more common.

I am starting to wonder why this is not in the rear projection topics..maybe the model number is wrong?