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

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Sound only comes on after about an hour

My Sharp LC-37D4U is about 15 months old. Unfortunately, the sound does not work until the tv has been on for about an hour or more. I have manually reset the tv numerous times to no avail. Any solutions aside from bringing a tech in for $150/hr to diagnose and then charge for labor?

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Re: 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.

Posted on Jan 27, 2008

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2 Answers

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

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Sharp Aquos 37" LCD TV sound quit

You could open up the TV and look for signs of burnt components then try to replace the components or try to find a replacement for the entire affected board on ebay or something. If you can find out what the problem is maybe the service person will lower there price. $600 does seem very steap, it should be something closer to $60 an hour with maybe the first $60 as an estimate.

Feb 26, 2008 | Sharp Aquos LC-37GD6U 37 in. LCD HDTV

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

Set up only visible for 2 seconds, then black - Aquous lc-37d43u

Unfortunately I can promise you that you CANNOT repair this. Your power and opc lights coming on, but the tv is not coming on. That is a issue within the tv. Give sharp a call and they will have somebody come fix your tv free of charge, if they cant fix it, they will replace it for free. That is the only thing you can do. Sorry bro

Dec 10, 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

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

10 Answers

No sound on Sharp Aquos 37' LC-37D4U

When I first bought my Sharp Aquos 42 inch TV...I started having sound problems...turned the volume way up to 60 maximum and could hardly hear it.
Then after the TV was on for 4 or 5 hours, there would be crackling chirping popping noise. It seems after the TV heats up for awhile...there is MAJOR sound problems.
So I was advised to buy a Sony surround system and connect it to my TV...deactivate the TV volume and use ONLY the surround sound. I did that...but the surround audio cables are connected to the back of the TV and I get the exact SAME problem with chirping and crackling sounds after the TV heats up.
There should definitely be a RECALL on the sound board.
Replacing it does nothing....the overheating of the TV just damages the new sound board and the TV has to be repaired again and again.

Feb 26, 2008 | Sharp Aquos LC-37GD6U 37 in. LCD HDTV

1 Answer

No sound

Hey duran,

I don't have a solution, but if you're still having the same problem. I can help by buying the TV from you as long as the screen/panel still works. write me back

Oct 24, 2007 | Sharp LC-37D4U 37 in. LCD Television

2 Answers

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.

Oct 21, 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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