Question about Sharp Aquos LC-32D40U Television

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No sound on Sharp Aquos 37' LC-37D4U

Several people I've seen here have posted the same exact problem...turn on TV, here small popping sound, NO SOUND comes from speakers. Sometimes it corrects itself by turning TV on and off again...mostly it doesn't work. I found a place to order parts, but I've no idea which sound parts to order, as there are around 6 or 7 of them. PLEASE HELP!!! When first turned on, there is no sound, both from cable input, and DVD. After a while, turning the TV off and on restores sound, but it can take a while and several attempts. It is definately the TV. not any other input source.

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  • eastonp Jul 03, 2008

    Any solution to your problem? I had called Sharp, and they claim that they've never heard of the issue from anyone. Of course.

  • gizr Sep 10, 2008

    I have the same make and model of televisions and identical problem...were you able to find a solution?





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

Posted on Jul 23, 2008

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But doesn't sharp give only 1 year warranty?

Posted on Sep 16, 2008

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michaeldalpo
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SOURCE: No sound on Sharp Aquos 37' LC-37D4U

sound went out on ours and we reset everything to factory and it started working again

Posted on Mar 03, 2013

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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 circuitcity.partsearch.com 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 eserviceinfo.com. 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 avsforum.com/avs-vb/showthread.php?t=647174&page=13 for pics of the information detailed here.

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

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