Question about Proton MM2701VT 27" TV

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Sylvania Television shut down suddenly with a high pitch sound at the back

Sylvania TV shut down suddently and has a high pitched whrling sound.

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TV's have a circuit that monitors the high voltage and shuts down the set if it senses something amiss.
Figure on replacing the flyback transformer.
Hope ya fix it!

Posted on Jan 28, 2008

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Posted on Jan 02, 2017

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50 " DLP makes a high pitch squilling sound and shuts off several times


Check and replace its color wheel. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

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When I went to turn on my 20 month old 46in LCD LN46A500 it made the loudest high pitch screeching sound that no one would like to hear and the picture was black. The remote buttons and the TV control...


The power supply board have fail badly,all that high pitch screeching sound,it came from those high voltages gaps from those tranformers,that giving ur tv high voltages.The power supply board,that the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

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When turning on samsung hln467w, lamp light blinks, screen stays dark, can hear audio from tv show, but then a high pitched sound begins for a few seconds. The tv turns on and off for a few cycles with the...


The tv have a colors wheel,have a whinning high pitch sound,mean colors wheel is warping not spinning right any more.The colors wheel is dead,must be replaced.The tv have high pitch sound,shutdown the projection lamp.The projection lamp might be dead or not?Not yet determine dead or just shutdown by the nonfunction of the colors wheel.

Aug 05, 2010 | Samsung HLN467W 46" Rear Projection HDTV

1 Answer

When i plug the tv in, i get a high pitched sound


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that "sound" that gives it away, this is a typical switchmode Power Supply problem

Mar 06, 2010 | Televison & Video

1 Answer

Tv will not power on. Hear a high pitched sound


the horizonal output transistor is shorted-replace it also resolder coil near transistor-if output shorts again flyback transformer is bad

Sep 15, 2009 | RCA F36673ET 36" TV

1 Answer

Tv turns on and then right back off


it sounds like one of the boards are going out I would call sylvania and check with there service dept maybe they can send a tech and part out under warranty

If you need further help, reach me via phone at https://www.6ya.com/expert/david_eb7ea98642566cc6

Jul 20, 2009 | Sylvania 6842-PEM 42 in. EDTV-Ready Plasma...

1 Answer

Our tv made a loud high pitched noise for a few weeks and then the color went green to then shutting off. Now, when we try to turn on the tv, the light blinks and then it just shuts off and keeps repeating...


Hi, Symptom shows high pitch sound is of color wheel that is not spinning any more so TV stay in protection mode and does not power up. TV requires color wheel replacement.

Jun 15, 2009 | Samsung HLN5065W 50" Rear Projection...

1 Answer

Sylvania SRT2232S Powers On, No Picture, High Frequency squeal


Hello there. I'm sorry to say that it sounds as if the element that actually energizes your screen is bad. It is most likely overheating. or quite poosible the power converter lost a resistor or 2.

Nov 27, 2008 | Sylvania SRT2232S 32" TV

1 Answer

Rca 27410tyx1 will not shut off


Sounds like trouble in the standby/power up circuit. have you tried unplugging the TV for a half hour and seeing what happens? It might start up but I think this problem won't go away. If you heard a high pitched buzzing it sounds like a problem in the high voltage not letting the start up circuit work. threy are related. The start up circuit waits for the high voltage to stablize and then switches it on.

Sep 16, 2008 | RCA TruFlat 27F520T 27" TV

1 Answer

Sylvania SRC21134


This could be a High- Voltage shutdown circuit problem. The reason it will stay on longer with a bright picture, is the high voltage is slightly reduced, not allowing the shutdown circuit to shut off the set. But I believe your problems to be in the shutdown circuit.

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