Question about GE 31GT740 31" TV

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No picture ,No sound except high pitch shriek from transformer/JW14140

No out put except for noise like a very high speed cricket that appears to be coming from a transformer marked "JW14140" on the PC board. Used a stethiscope to track down sound. Had back of set off including cover under Main PC Board. Examined soldering on board with magnifying glass and found nothing to speak of. Also notable : The power button has no affect on anything. Noise from board continues unchanged.

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  • 428nik Feb 18, 2009

    My TV is 8 years old and I have the same problem. Is it worth replacing the parts? What would be a ballpark estimate?

  • Anonymous Apr 03, 2009

    no sound or picture just a high pitch noise

  • alb107 Apr 03, 2009

    no picture or sound just a high pitched sound. i talked to a repairman, he said high voltage transformer but expensive and new part only works for acouple days

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  • 17 Answers

Change the horizontal output transistor,that's it,thanks and let me know.

Posted on Nov 20, 2008

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Check your power supply board,higher voltage than the normal voltage coming out to your power supply,replace the oscillator that control your regulator.

Posted on Sep 25, 2008

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Tv just started making a very high pitched noise, although picture and sound are fine?


Barb, noise may be from a power supply/ transformer on it's way out.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

HELP what is that high pitched noise when tv is on

Is your LCD making buzzing or high pitch noise

Mar 04, 2016 | Sanyo Dp55441 TV

2 Answers

When driving at speed i get a loud whine/shriek from rear driver side wheel, when breaks are applied noise goes. (disc ?) new discs fitted 3 years ago.


the brake pads have a wear indicator as the pads wear the indicator will tuch the brake rotor and make a high pitch shriek, so you need new brake pads.

Aug 15, 2011 | 2005 Hyundai Santa Fe

1 Answer

High pitched noise from inside the TV when picture comes on


Hello randapaint,

This might be from the IHVT (Integrated High Voltage Transformer), or more specifically a short in the IHVT causing it to arc, producing the high pitched whine, you are hearing. Take the back off of the TV and try to detect where the sound is coming from, more then likely you will notice it coming from the section that contains a large component with a large red cable coming from it, to the top of the CRT (picture tube). Replace the IHVT (with the exact same model) if it is bad.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Apr 07, 2009 | Televison & Video

2 Answers

High pitch noise from the flyback


You can tell to some extent what it may be by listening carefully and trying to identify the location. If you, remove the back cover of the set; stay away from danger, just listen to where it seems like the sound is coming from. If it is coming from inside the high voltage cage it is the flyback. If coming from around the main power transformer it is one of the power supply parts.

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Jan 23, 2009 | Samsung HL-P6163W 61" TV

2 Answers

High pitch


I have never heard a tube make noise when there is a good picture. Anyway, the noise has to be a transformer ringing or oscilating. They make a high pitched squeal when they have a loose winding or their cover is loose. You probably won't be able to feel or see anything loose on these transformers The power supply switching transformer is the first to look at. Take a hot glue gun and just cover the thing...especially at the base of it. The next (and only other) one is the horizontal drive transformer.It is located close to the high voltage transformer( biggest thing on board and usually in back or corner of the PCB.This one wont squeal) The horizontal drive transformer is about the size of a large marble and is encased in a black plastic cover. Cover it with hot glue also.
If you take the back off you will probably be able to localize where the squeal is coming from. You will probably need a signal to hear the noise also. After you find where it is coming from UNPLUG the set before doing any hot gluing!!!!
If you 're not up to this procedure take it to a technician. Your tube is not going bad and the set is definitly worth repair. Simple fix!! Good Luck!!

barneyluc

Oct 03, 2008 | Sharp 32SC26B 32" TV

2 Answers

Samsung LNT3253H is making a high-pitched noise


I had the same issue. The tech that came out today removed the transformer on the power supply board, "resealed" it, and replaced it (re-soldered the same part back on) -- the transformer apparently vibrates because it was not properly sealed. BTW, mine was about the fifteenth that he has performed this repair on within the past couple of months -- all 32" and 26" Samsungs. Now, it appears to be absolutely silent.

Mar 22, 2008 | Televison & Video

2 Answers

Weird noise over everything


According to the Samsung website: "The high pitched sound you hear is probably coming from the flyback transformer. The flyback transformer converts the relatively low voltage electricity that comes from the outlet in your home to the high voltage electricity needed to drive the cathode ray tube in your TV. It is not unusual for a flyback transformer to buzz softly when it operates. However, if the sound is loud and high pitched, it probably means the transformer is failing. To eliminate the sound, you will have to get your TV serviced."

Nov 08, 2007 | Samsung SlimFit TX-S2783 TV

3 Answers

High Pitched Noise


most high pitch noise comes from the anode conection on the picture tube thats connected to the flyback anode cap thats mean there is a high voltage leak,to stop the noise you can discharge the high voltage take off the cap and clean with alcohol.if the noise continue.you will have to put some red or clear silicone both the cap and tube stick together leave to dry for about 2 to 4 hrs.this will eliminate the leaking.good luck.

Jun 11, 2007 | Toshiba 27A41 27" TV

1 Answer

High pitch ringing noise and picture distortion


Sounds like the capacitor that goes bad just before the hIgh Voltage transformer goues bad. If i were you I would call an authorized RCA repair Shope and see if this is going to cause more damage to your set in the future.

Aug 25, 2006 | RCA HD52W59 HDTV Projection Television

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