Question about Sharp LC-37D4U 37 in. LCD Television

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Sound goes out from getting hot

I have had my sharp lc-37d4u for18 months. The problem just started when tv is on and starts to heat up the sound goes out and will not return. A tech came and fixed it calling it a IC-2502. But the problem as returned

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Re: sound goes out from getting hot

Give the tv plenty of ventilation. i had a 8 year old tv that would do many weird things in the summer, on very hot days.the tv was in a poor area of fresh air. if i shut it down, after a minute, it would work fine.

Posted on Jan 31, 2008

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Re: sound goes out from getting hot

I would call his tail and tell him the problem has come back and he needs to too. He needs to check and see if the proper voltage is at the pins of that IC.

Posted on Oct 21, 2007

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My audio doesnt work for my Sharp LC-37D4U.

common problem with that unit you will need the main av board replaced

Nov 18, 2009 | Sharp LC-37D4U 37 in. LCD Television

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No sound from LC-37D4U

Have u tries take it apart and reconnect everythings that involve with sound card.
Tries to replace in-out put signals cables link to sound out put?

Aug 24, 2009 | Sharp LC-37D4U 37 in. LCD Television

2 Answers

No sound on Sharp Aquos 37' LC-37D4U

Almost all intermittent audio or audio failure problems with Sharp Aquos LC**D4U, LC**D5U, LC**D6U, and LC**D7U televisions are the result of a relatively simple design flaw involving the heatsink pad compound used on the Tripath TA-2024 amplifier chip (IC2502) found on the A/V board. This compound has a fairly low melting point and, over time, tends to seep out from between both top and bottom heatsinks onto the legs of this chip as well as onto circuitry immediately surrounding it. Further, over time the seeping compound also becomes somewhat conductive creating bridges which short the audio amplifier circuit causing everything from intermittent audio to complete audio failure.

Fortunately, in almost every case audio can be completely restored by cleaning the old compound from both top/bottom heatsinks and from both sides of the PC board in the area immediately surrounding the chip (I used rubbing alcohol which worked quite well). Sharp has issued a service bulletin addressing this issue (LCDTV-194) wherein a ‘2502 Heat Kit’ is specified. This kit is Sharp Part Number: PSPKIT663WJZZ and is available from for $19.95. However, it’s entirely possible to get by with the heat pad only, Sharp Part Number: PSPAZA663WJKZ for only $9.95. Please note that board replacement for this problem is almost never necessary, so if you’re working with a repair technician be sure and insist that he/she be certain to try cleaning the old board and replacing the aforementioned heatsink pads before charging you for a new board.

If one is reasonably familiar with electronics disassembly/reassembly and is willing to take their time, this can even be a DIY project. It is possible to find ‘important service references’ by simply entering LC26D4U (the 5, 6, and 7 series are very similar, and this information covers all screen sizes) into the search field at This will greatly aid in disassembly/reassembly of the TV, as the A/V board is somewhat ‘buried’ under other boards. Please refer to post # 373 at for pics of the information detailed here.

Particular thanks are owed ‘Aureius’ of the AVS forums for his research efforts concerning this issue !

Jan 25, 2009 | Sharp LC-37D4U 37 in. LCD Television

1 Answer

LC-37D4U Sound Problems

I used your site to look up a problem awhile back and was helped by a guy who went by, Les Price (

I purchased a Sharp LC-26D4U LCD television and after about 16 month, the sound went on the TV. I could not get anything but popping noises out of the speakers. I hooked the TV up to a stereo and the sound worked only while using the stereo speaker from the stereo, still nothing from the TV speakers.
I searched this problem on your web site and saw a posting in which this Les Price ( posted a fix. He stated this unit had a chronic problem with the insulator material used on the heat sink on the ic’s on the AV bd. He stated the unit had to be disassembled and the av bd removed. He stated the insulation on the ic 2502 breaks down and must be cleaned off and that a new insulator, part # PSPAZA663WJKZ must be ordered and used as the insulator pad. He stated there was a Sharp Technical bulletin LCDTV-194, which explained the problem and suggested this fix.
I Goggled the suggested part #, PSPAZA663WJKZ finding and ordering the part from I got a copy of the service bulletin, which had pictures and instructions on the repair.
On 25-Jan-09, I disassembled the TV, removing the back, a metal mount under the plastic back, and three circuit boards, locating the heat sink on the back of the AV board. I left the black sticky residue on the heat sink as the service bulletin suggested and installed the new insulator pad as shown on the service bulletin. I put the TV back together and found the TV volume to work again. I could not believe it worked.
Taking the TV apart made me a little nervous. I am not a repairman, however I do like to, “Tinker” with stuff. There were a lot of screws and wires to keep track of and a little tricky to put back together. If I had to do it again, I would either video tape the disassembly to make sure I replaced everything back the way it was, or at least take a few photos while disassembling.
I just wanted to say thanks for your web site and thanks to Les Price for his help. You both saved me some cash.

Oct 01, 2008 | Sharp LC-37D4U 37 in. LCD Television

2 Answers

LC-37D4U TV sharp aquos

Sorry, the only reason I have tv and video listed on my expertice is becouse of remote controls, people post them sometimes under wrong things so I add the whole thing to get the most problems.

ask another expert, use the find experts link on the front page, slinteriors should be able to help ya

Sep 17, 2008 | Sharp LC-37D4U 37 in. LCD Television

2 Answers


Is this a problem that just started or has been since you bought the TV ..Try going into the control pannel and checking your sound settings. Make sure it is not set to something diffrent on MTS (Mulit-channel Television Sound)Some times the sound gets switched while programing your TV. Make sure it is not turned on to SAP (this sometimes will happen and you will get NO audio) There should be several settings on these tvs for your audio ..Check to see if the "variable " is selected in "output select ". Also check to make sure your plugs to the outputs are correctly installed and if you have it hooked up to a home theater try turning it on , you may also wish to try to change the settings IE , tv , DVD , VCR ect on the home theater as sometimes they get pluged into the wrong input . If all else fails I would return it to place of purchace or call thier tech support at Sharp , ask for a supervisor ...

Sep 17, 2008 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

2 Answers

No sound on Sharp Aquos 37' LC-37D4U

Call Sharp. They are fixing my 18 month old LC40C32U for free.

Jun 10, 2008 | Sharp Aquos LC-32D40U Television

1 Answer

Sharp LC 37 D6U

That popping noise means the silicon grease underneath the audio ic has melted and is shorting the audio. This is unfortunately a design flaw by sharp. To fix the problem, you'd have to disassemble the entire TV and clean off the melted residue off of the AV Board and replace it with a new Sharp Heat Insulation Pad. Its a pretty difficult job, I suggest calling your local Sharp authorized service center to fix that for you.

Apr 07, 2008 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

1 Answer

Sound only comes on after about an hour

I had the exact same problem. It was very frustrating to say the least. As it turned out the AV board went out and it cost $600 at total of $800 including labor, which makes this very expensive to replace. I actually had to think about junking the unit before it was even two years old.

Oct 02, 2007 | Sharp LC-37D4U 37 in. LCD Television

1 Answer

Sharp LC-37D4U 1080i picture problem

have the cable company set the box to 720p whic is the native resolution of the set.this will help with quick signal adjustment

Dec 29, 2006 | Sharp LC-37D4U 37 in. LCD Television

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