Question about GE 31GT660 TV

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My tv all of a sudden has horizontal lines across the picture.

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You have bad grounds on your vertical IC. And you have a bad capacitor or two. I don't recall the actual location of the vertical IC location. I would say it may be U4501 location. Resolder the seven pins of this IC. Now check capacitor locations C4505 which is a 35 volt 220 Mf value, and C4506 which is a 63 volt 330 Mf value.Replace these caps as necessary. Then check the solder grounds at the power supply chip U4101, this chip is a switch mode regulator and may become detached from the board. Resolder these 11 pins and be careful not to short the pins with too much solder. Please note the two pins on the right (separated by a missing pin) are soldered together, this is OK. Now for the biggest challenge. You must pull the bottom shield off the tuner (has the RF connection). Yes, this area can produce the horizontal lines you speak of. When removed, you will see about 15 bad solder connections. This area will require great skill to resolder. The solder on the perimeter of this tuner is very difficult to work with, and you do not want to burn off any traces connecting to out side feeds. You could destroy this board. Now inside the tuner area there will be 5 pins or grounds that will need resoldered. Be careful here and not to burn off the small traces leading to other connections. Replace the tuner shield after complete inspection and soldering. In some cases the eeprom, locationU3201, will need replaced. Might not in your case as you say you can still watch TV and the audio is good. I know this is a lot of information, but this TV can be saved. I have repaired many of these. Thanks for asking and show a few hands of support.

Posted on Mar 27, 2011

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Hi,that its cause by some bad capacitor in vertical circuit and bad soldering on the vertical ic
or the vertical ic its self is bad.replace all vertical ccapacitor and chek for bad soldering
note you may replace by the same value writed on the cap
hope that will help
regards alan.

Posted on Mar 27, 2011

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