Question about Oxxotek LT-3001W 30 in. LCD Television

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Power problem problem switch on tv lcd,buzzing transformer sound like coller not speding around.i try to get ansver my question,bicouse is expensive gived tv to service repear.i don manny diferent tv,lcd is somthing new for me.i fink is transformer problem.what is your solution..many thanks greg london

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Re: power problem

Hi there the problem is find.when i remove decoder the power on aut transformer 12V coming i just need new decoder and start use tv..manny thanks greg PS:im lock in side of corse is after woranty,bye

Posted on May 21, 2007

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Lcd buzzing

sounds like a transformer having an issue either the power supply or inverter. You should be able to isolate which one by removing the rear cover then turning on the cover. ( Dont touch anything when its plugged in and playing just listen to see if you can tell where the sound is coming from.)

Feb 11, 2013 | RCA 42LA45RQ 42 in. LCD TV

2 Answers

I have a proscan 42LA45H 42 in television that has started making a buzzing noise from the back. What is causing this, and what do I need to do to fix.

If picture and sound is Ok, and only this buzzing sound is heard from the back of the TV, It should be due to core soose of some ferrite cored transformers inside, especially to the power supply regulator board of the TV. Open the back cover of the TV and swtich it ON. Listeen very carefully which transfromer makes the buzzing noise. Just trouch and press the core of the transformer suspected with some non-cunductive material like glass rod, or a stick of dry wood. You can identify the transformer that makes noise by this way. After identifying the exact transformer; switch OFF the set, unplug it from mains socket, apply some "Super Glue" like fast boanding glue to the joint of core of that transformer. Allow sometime for the glue to set. This will solve the buzzing sound problem of your TV. OK

Jul 13, 2011 | Proscan 42LA45H 42 in. LCD TV

1 Answer

My Philips TV, 32 in LCD, model 32PFL3505D, makes an intermitent buzzing sound, mainly when there is text on the screen with a white background like on advertisements. What is the problem and can it be...

The buzzing sound comes from transformers on the PSU. The transformers can be sealed using a sealant spray which dries and hardens. You can also check your picture settings in the menu, if there is a "vivid" option, pick it and your buzzing will not be heard.

Jan 11, 2011 | Philips 32PFL3505D 32 in LCD TV

1 Answer

Today I bought SONY KDL37EX402 LCD TV. Immediately when I turned it for the first time I noticed an unpleasant sound like a “buzzzzzz” from the back of the TV. As I worked it for more then 5 hours I...

It can be from the power supply is not able the supply enough power due to failing components in the power supply module such as DC filter caps or loose transformer core is vibrating or from the backlight inverter transformers. You will have to take a close listen to find out exactly where the noise is generated from first.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:

Failed TV and Monitors:
Capacitors kit: he can make you a set of caps.

Oct 23, 2010 | Sony BRAVIA KLV-37S310A LCD TV

1 Answer

Buzzing noise coming from Vizio HD TV speakers

It ur Vizio tv,The power supply board is the problems.The transformers in the power supply board have gaps in the transformers.The high voltage curents flow that make that buzzing noise.

Apr 07, 2010 | Vizio VW32L 32 in. LCD HDTV

1 Answer

Picture ok but loss of sound with high pitched buzz

Power board have problems.Take the tv aparts put some super glues on all around the transformers.Will help lower the buzz alots or stop it completely.

Feb 17, 2010 | Toshiba 32AV500U 32 in. LCD HDTV

1 Answer

When i first turn on tv, it makes a buzzing sound that fads in a few seconds, does this each time we turn it on, just been doing this a week.

A transformer or inductor winding needs replacing, you should get this serviced before it becomes a larger more expensive problem.....

Nov 02, 2009 | Polaroid FLM-3734B 37 in. LCD HDTV

1 Answer

Buzzing sound

Hello, This is a problem with the switching transformer or the ballast used to fire the backlight. You will have to replace the ballast and or the switching transformer soon. In order to replace these items, I would suggest taking it to a qualified TV technician for servicing. I hope this helps, Thank you, Shuttle83

Jun 10, 2009 | Polaroid FLM-3734B 37 in. LCD HDTV

2 Answers

Proscan 40' 40LC45S has a high pitched hum when it is off. Sound goes away when TV is on.

Same problem here, there is a high-pitched sound in standby. As soon as the light turns blue and the TV is on it's gone. I actually exchanged this TV three times at Best Buy but all the models made the same buzz in standby. I was told that it's normal and in the store you can't hear it since there is too much humming from other TVs around. The power is transformed down to a minimum, just for the remote controls, internal clock etc. and this causes the buzz, like when you dim your lights at home. I hooked it up to a surge-protector for clean power and just switch it off over night. During the day it's hard to hear anyway. - Again, since this is my third (!) Proscan 40' exchange I can definitely say that this is normal for this model. I was just surprised that nobody mentioned the same problem so far on the Best Buy reviews.

Jun 10, 2009 | Proscan 42LA30H 42 in. LCD Television

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