Question about Toshiba 57H81 57" Rear Projection Television
I have a Toshiba Model 57H81, for the first 15 minutes or so of being on the picture is normal. After about 15 minutes two vertical lines (sometimes red, sometimes green) appear at 1/3 and 2/3's of the screens width. Shortly thereafter white horizontal lines appear but are confined between the divisions made by the vertical lines. Each third of the screen has white horizontal lines which confined within the 1/3 section they develop in and are isolated from the next third of the screen. Then ghosting starts, the ghost is above the original image. Since TV picture is normal when it first comes on it indicates that this is a heat related issue. I used a can of air to cool IC chips which removed the horizontal lines and ghosting. The chip that did the trick is the a 40 or 60 pin chip (unfortunately soldered in rather than in an IC plug)near the front of the left hand circuit board with a metal shield over it (looking at it from the front of the TV). I have not located the cause of the vertical lines yet. I have not been able to find a service manual with schematics on the television yet either. Any assistance would be greatly appreciated.
My tv has now developed the 2nd line just as the original poster. Blu-ray & HD content is unaffected, but 480i & 480p is just about unwatchable.
Posted on Feb 23, 2008
Wow, I can't believe I have been living with this problem for a full year now. My work around has been to buy an upconverting over component DVD player (hacked Oppo 970 HD) The only thing that is still a real pain in the @ss is my PS3 that actually downconverts 720p to 480p instead of upconverting the 720p to 1080i. Unbelievable I know but my solution to that problem is to not purchase those games.
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Service manual can be found on eBay
Posted on Oct 18, 2007
I have not fixed it yet. But I have identified the chip that is causing the problem. If you have a service manual scan it and post it please, so I can show you the chip.
Posted on Aug 06, 2007
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My Toshiba 65HX81 has a very thin vertical line running the entire
height of the screen about 1/3 of the way across. This line is made up
of very fast blinking dots of red and green. This is visible only when
the tv is in a 480i or 480p mode. It is not visible when in 1080i. It's also visible when using the tv's internal tuner, so it's not an external component or cable problem.
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