Question about Emerson LC391EM3 39 in. LCD HDTV

1 Answer

Tv dead. high-pitched whine when plugged-in.

I was watching the tv. I heard a click (relay?), tv was dead. There was now a high-pitched whine coming from the inside of the tv that wasn't there before. I hear it when tv is plugged-in. I changed the power supply board but made no difference.

Posted by Howard Golk on

Ad

1 Answer

Prasanna

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 879 Answers

Sounds like the back-light inverter board has damaged. Check it.

Posted on May 21, 2013

Testimonial: "This person really knows their s**t and didn't insult me like other pinheads that asked me stupid questions like "is it plugged-in?" Wow, a person that's actually helpful. What a concept!"

  • Howard Golk May 23, 2013

    I'm sure you're right. Everything I've found online agrees with you. I didn't know this TV had a seperate inverter board until I found out it's hidden inside the LCD unit. THANKS!!!

×

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a magnavox 37mf331d/37 that has developed a high pitched whine.the longer the tv is on the louder the whine.the tv is 5-6 yrs old


It's likely a capacitor associated with the power supply having gone bad.
It's obviously beyond your expertise to repair it yourself.
Find a trustworthy repair shop and take it there.

Sep 05, 2012 | Televison & Video

1 Answer

High pitch whine when tv started then it lowers in pitch


That could be either the color wheel or one of the fans. try listening to which area of the set its coming from.

Apr 04, 2012 | Televison & Video

1 Answer

What causes a scratching noise coming from a 52'


Most likely if buzz or high pitched whine it is coming from a coil or transformer on the power supply board inside the set.

Mar 13, 2012 | Sharp Televison & Video

1 Answer

I have a RCA projection TV. The picture and sound are fine. After the TV is on for a bit it starts a highe pitch whistle. The picture and sound continue to be fine. What is the problem and what can I do to...


Most likely the color wheel is starting to go bad adn when they do they get a high pitched whine sound coming from the bearrings on the wheel. Might want to look at getting a replacement before it quits. When they die you can't watch your tv till it is repaired.
thanks

Jul 22, 2011 | Televison & Video

1 Answer

I have a Hitachi Ultra Vison 57S700 2004 model, the TV has had a slight high piched whine for a couple of weeks and today the screen went green then black and the sound was gone. When it is turned on the...


This tv is under five years old?Yes,it is worth fixing.Over five,i would compare the prices for a new LCD tv and the quote priced from the Tv Tech.for the old tv.This tv have high voltage problems around the Deflection circuitries area.Could be any things burn in this area.The high pitched whine sound,i'm sure it is from the FBT-the high voltages flyback transformer,high voltages current have no where to go.Must hire a tv tech. to troubleshoots and replace parts on the Deflection circuitries area.Also the FBT could be dead too,because HV Current bounces back forth and have no where else to go.The prices to troubleshoot unknown problems is about $400 bucks and plus cost of replacement of parts.

Dec 04, 2010 | Hitachi 57S700 57" Rear Projection HDTV

1 Answer

I have a samsung hln507 and there is no picture. we start the tv, it has a high pitched whining sound, the fan and the color wheel are spinning, but there is no picture. after about 10 seconds the tv turns...


The colors wheel is dead.That why,u hearing high pitched whining sound.The colors wheel is spinning off of is motor axis and grinding it sides walls,that where the high pitched whining sound came from.Hire a tv Tech. for the colors wheel changing,because it requiring to take out alots of the machanicals parts itself,before u can come to the colors wheel itself to change it.

Oct 16, 2010 | Samsung HLN507 50" Rear Projection...

1 Answer

High pitched whine/sometimes TV won't turn on


The power supply on this model will whine when it is shorted or overloaded - the set would have to be brought in to determine exact cause.

Oct 23, 2009 | Televison & Video

1 Answer

High pitch whining,


Ur flyback transformer it have cold soldier or is dead.U also could have prob. with ur power ic inverter board too.

Aug 16, 2009 | Sony KV-32S45 32" TV

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

1 Answer

High pitched whine coming from the back of the tv, inside


possible coil vibration look around the yoke plug try to isulate the noise to a section of the board the is acommon fault/if not call for service not pricy.

Dec 30, 2006 | Sony FD Trinitron WEGA KV-36FV27 36" TV

Not finding what you are looking for?
Emerson LC391EM3 39 in. LCD HDTV Logo

482 people viewed this question

Ask a Question

Usually answered in minutes!

Top Emerson Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76390 Answers

matt martin
matt martin

Level 3 Expert

1258 Answers

 Grubhead
Grubhead

Level 3 Expert

5700 Answers

Are you an Emerson Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...