Question about GE 31GT740 31" TV

2 Answers

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.

Posted by on

  • 1 more comment 
  • 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

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 17 Answers

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

Posted on Nov 20, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Hi I have a very annoying, ear piercing high frequency pitch coming from what seems to be the television. However, I was trouble shooting and based on the cable technicians thought; said to be the...


Hello
The LOT [Line Output Transformer] of your TV has damaged. It is the one, that supply all the voltaged needed to CRT. Its internal windings will get shorted in between, and is irreparable. Replacement is the only remedy to this proble. Replace the horizontal output transistor also with this. you haven't specified whether there is picture with your tV or not. If this high frequency sound is along with picture, there is some loose in the cores of the SMPS transformer, or LOT itsef. If there is no picture at all, and this high frequency sound is there, no doubt; LOT is damaged. OK.

May 22, 2011 | JVC TM-2703SU 27" TV

1 Answer

When my rca 36F530 tv is plugged in it makes a high pitched buzzing noise picture does not come on


There is a short circuit in the high voltage circuit. the transformer who helps to create the high voltage or his power transistor is damage. replacement needed. the repair is not expensive, because the parts are average repair. Ask for an estimate.

May 01, 2009 | RCA 36F530T 36" TV

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.

Please Rate This Fixya solution

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

1 Answer

RCA F27442tx51 dead but making high pitch noise


Update on finding replacement tripler (Flyback Transformer) for RCA F27442tx51. This is a follow up on my report dated Jan 12 2008. Further investigation revealed the Horizontal drive transistor was also blown. It is a 2SD2578. Internet search turned up ACME ENTERPRISES in Orlando Florida. www.acme-slaes.net. Surprisingly they also sell Flyback Transformers as well as other TV repair parts. The cross reference for the needed Flyback is ACME-2236 FBK. The part number for the transistor is 2SD2578 SANYO TRANSISTOR. The price for the transistor is $2.69. The Flyback is $22.95. Shipping to CA is $6.75 and handling is $1.99. Two days after ordering, the parts were at my front door. The set works now except the picture still goes off after 5 minutes or so and then comes back on, sound still works during the dark period. The original symptoms before it blew out in the middle of the night and started chirping. I now have the set on the bench attempting to find the intermittent part. Stay tuned I'm on the hunt.

Eng Don

Nov 19, 2007 | Standard (CRT) Televisions

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

1 Answer

RCA 36" TV - High Pitch Sound - No Picture or Sound


check for high voltage s3ection of your TV. A Flyback transformer is defective especially in the high voltage cale of your flyback....

Oct 19, 2007 | RCA 35V432T 35" TV

1 Answer

27 inch tube tv won't stay on


You have a problem is in your horizontal section which also is part of your power supply. The high pitched whine is from the Intergrated High voltage transformer (also called the flyback transformer). This sound occurs when the freuency of the transformer changes and or the voltage gets too high. The click occurs as a result of the drawing of excessive current by the HOT Horizontal output transistor. This is repairable, but requires the correct equipment and a schematic.

Sep 19, 2007 | Philips Magnavox 27MS343S 27" TV

1 Answer

High pitch sound and fuzzy


The high pitched sound, probably not, unless you open this TV set and find out what is making the noise and replace the part. Most likely a coil or transformer is vibrating so fast that the frequency is very high. On the focus, possibly can be adjusted. Now when you take off the back of this TV set, i must warn you, follow my instructions to the letter as there is enough High Voltage in this set to make a grown man cry! After you take out all of the screws off the rear cover,carefully lift up the cover straight up. Oh by the way the TV should be face down. Opps! Not stand back up the TV set and there will be a Grey or black block like looking thing with a large red wire going to the top of the picture tube. on this block you will find two controls, one will say screen, and the other will say focus. DO NOT ADJUST ANYTHING ELSE WHEN YOU ARE IN THIS TV SET!!! No slowly rock the focus control back and forth till you get the sharpest picture. Put back on the back cover and enjoy!!! Good Luck

Jun 13, 2007 | Samsung TXJ2879 28" 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

Not finding what you are looking for?
GE 31GT740 31" TV Logo

Related Topics:

227 people viewed this question

Ask a Question

Usually answered in minutes!

Top GE Standard (CRT) Televisions Experts

matt martin
matt martin

Level 3 Expert

1191 Answers

The Knight
The Knight

Level 3 Expert

68323 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a GE Standard (CRT) Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...