Question about Toshiba 57H81 57" Rear Projection Television

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57" Toshiba with wavy green/red lines "good overall picture"

The other day after watching some tv, there were red lines going horizontal across the screen, i tried to converge but the color's are lined up, 2 days after i noticed its now red and green ... the lines are coming out of the bulbs as i checked the mirror and screen and looked inside the bulbs, the lines kinda go in a wave, each color in its own line .... blue doesn't seem to be doing it ... the picture quality is just fine, its just the lines across the screen really ....

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Re: 57" Toshiba with wavy green/red lines "good overall...

Appears to be a convergence problem, the chips are located on large aluminum heat sinks. Check near the 2 or 3, STK IC's for + and - voltage usually 20 to 25vdc. If 1 or both are missing, check microfuses. They should both be close to equal in voltage reading, if not, turn set off after it has been on for 10 minutes, feel the heat sinks at each IC,if one is hotter than the other, replace both IC's or all 3 if it has them. Now check the small low ohmage resisters in and around the STK IC's and you will most likely find a few burnt or discolored and have changed in value, replace these or the new chips installed will self destruct.

Posted on Jun 29, 2007

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Screen turn green tv is 57 rear projection

Good Day,
It appears that you may have a green drive issue. Try adjusting the Sreen Control it is located in the front of TV.
1) Remove Speaker Grill (it just pulls off) start at one end, 2) Remove cover (5-6 screws), 3) Adjust control. The control is located on lower right side towards bottom. A small black device with 2 rolls of controls, adjust the center control on bottom row counter clock wise, until you get a black and white picture.(adjust with color control to min).
If this does not work you light bulb (CRT) is bad about a $750.00 repair.

Good Luck, Big Irish.

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Check out this site. These TV's are known for the CRT's going bad. This site shows how to make adjustments that could help extend the life of your set. Take a look at the first picture, if the lines look like the ones in the picture this site "should" help. The picture shows a problem with the red but don't worry about the color, look at the lines. I hope this helps.

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Typically this is a convergence problem and can be repair relatively easy. Refer to this video to determine if you truly have a convergence problem. Also make sure you use your TV's original remote to make this adjustment.

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This sounds like you may have bad picture tubes. Most likely the green and red tubes. You would have to have them replaced and realigned. I would call a Sony ASC and get an estimate to verify this. An onsite service call could verify if this is what's causing your problem.

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I had this problem around the time my TV was 3 years old. I ended up having to get it repaired at a TV repair place, it cost me $375.

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make sure you replace all the 10uf caps and that the connections are good....

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I gather from your post that wavy can mean two possible things as the TV comes on, you see the picture flow like ocean waves? In this case you may have 60Hz hum modulating with the picture, this is actually unlikely these days, but I have heard it happens sometimes. The other thing it could be is light horizontal tearing. This happens when the horizontal frequency is too high or too low. You are not going to like my solution because I feel that for problems like this the set must be analyzed not just subjected to "shotgun troubleshooting", so here I go, Take the TV to a repair shop.

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