Question about GE 31GT660 TV

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GE TV picture closed in went back to full size then went blank no sound. squealing sound heard 31gt660 S# 943422808 C# CTC187CH

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  • davebruce Nov 10, 2008

    picture closed in went back to full size then went blank no sound. squealing sound heard
    31gt660
    S# 943422808
    C# CTC187CH would like instructions on a repair can I get more info from this person. Solution #1posted on Oct 25, 2007
    Guest

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    horizontal output transistor is defective,also change out damper diode(cc4402). very common repair. use buh517 transistor. they last longer. i just repaired my own personal set. same problem. Solution #1posted on Oct 25, 2007
    Guest

    Rank: Apprentice
    Rating: 0%, 0 votes

    horizontal output transistor is defective,also change out damper diode(cc4402). very common repair. use buh517 transistor. they last longer. i just repaired my own personal set. same problem.

  • davebruce Nov 14, 2008

    while watching tv picture closed in the went back to full size then closed in an went black no sound other then squeal sound
    davebruce

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I'm sorry about the nonsense solutions that you have received thus far. Since the set "recovers" somewhat, this can be a couple of things. Most simply, it can be a poor solder joint that is interrupting normal operation. This is easily fixed by resoldering any connections that appear to be grainy or have rings. Please unplug the set and let it sit for a while before attempting this. Note that TVs retain quite a bit of electricity and can be dangerous even when unplugged.

That being said, the breakdown of the internal insulation in the flyback transformer can cause this as well. If you can solder, look for the poor connections first and update this if you still have problems.

Dan

Posted on Nov 14, 2008

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There is no way out other then you call a technician... 

Posted on Nov 14, 2008

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Hi after removing screws on back you will find 2 tuners the left tuner is fine tune adjustment by adjusting it your problem will be solved please rate it.....thank u

Posted on Nov 10, 2008

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Dear Sir/madam,

The first thing you should try is a hard reset. Unplug the tv before going to bedthen plug it back in in the morning. If this doesn't work you have anessential failure which will need repair. The two main causes of thetype of problem you are having is either a poor solder connection righton the board where the screens connectsto the TV, or the second a faulty Picture tube. I think the picture tube has problem. This will huge cost to repair. Check out with warranty. Either way it will need tobe attended to by a technician. I recommend checking the warrantyinformation that came with the unit to see if there is any way you canrecoup some or all of the cost of a repair which will be needed.Hopefully the manufacturer will take care of it for you if it is withintheir timeframe. I hope this helps...


thanks
good luck

Posted on Nov 10, 2008

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Squeal sound  is due to an excessive load on the power supply, check the horizontal output and flyback transformer.Moreover horizontal output transistor is defective,also change out damper diode(cc4402).  use buh517 transistor. they last longer. and if it does not turn on replace eeprom ic.

Posted on Nov 10, 2008

  • AbdulRahiman S Nov 10, 2008

     take a look at the horz. driver and the driver transformer.


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It need to repair ecnically by qualified technician.

Posted on Nov 10, 2008

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