Question about Sharp Aquos LC-42D62U 42 in. LCD HDTV

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Lc-37d6u intermittant audio issue

When turning on tv in the morning  sometimes it takes 30 minutes of turning system on and off before the audio starts to work?

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I'll tell you but it's not easy to do it. The heat sink radiator for the audio amplifier IC is touching the circuit board. You have to remove it and to replace the sillicon. The radiator is situated on the back of the AV board. You got to remove all boards to get this one.
Good luck.

Posted on Dec 06, 2007

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Posted on Jan 02, 2017

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1 Answer

TV intermittently loses and regains audio/video from only a couple TV channels


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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Can fix the audio problem myself or is there a place that willing to buy my Sharp LC-37D6U TV with no audio? I would prefer to make some off it than recycling it away.


Actually there is a service bulletin on this television. Sharp will repair the no sound problem for no charge. Call 800-237-4277. Please remember to provide feedback here if this helps you.

May 07, 2010 | Sharp LC-37D6U 37 in. LCD Television

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Tv takes forever to turn on sharp television LC-32SB23U


This problems very common with sharp tv.The Main Turner Signal board have problems.Keep using it,when it stop and completely dead 20-30 on-off no backlight show up and picture.U know ur Tuner board signal board is dead, have to replaced it.

Jan 06, 2010 | Sharp LC-32SB23U 32 in. LCD TV

1 Answer

Sharp LC-37d6u audio problem


Have you tried the reset buttons on the back of the TV?
It should be right below your Cable IN port.

If that doesn't work, you may have to take it into a repair shop for the main unit board to be replaced. The part # is KD352
It's $99.59 at Shopjimmy.com
So, don't let the repairman rip you off.
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Mar 31, 2009 | Sharp LC-37D6U 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 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 !

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

2 Answers

No sound


Please try unplugging the TV for two minutes then replugging and turning it back on. Werked fir me!

Dec 12, 2008 | Sharp Aquos LC-32D40U Television

2 Answers

Sharp Aquos LC C3242U - Intermittant Sound Switching from Mono to Stereo


Not sure if I just got lucky or if the problem is solved..I hooked up my Sharp Aquos LC-32D64U the other night and I had the blue audio box pop up. Mine was only in Mono and would not switch to Stereo...Well, Local cable company is of of Hi-Def boxes but I thought what if my Digital box is bad/old or has some sort of problem. I went down to comcast cable company switched to a different digitial box..came home, hooked it up and so far no blue audio box, plus now it shows that it's in stereo..good luck

Aug 30, 2008 | Sharp Aquos LC-32GD4U 32 in. LCD HDTV

1 Answer

Sharp LC-37D6U Aquos audio problem


Your Aquos does not have a separate Audio board, audio circuits are mainly on main pcb. If the guy was able to fix the problem by hooking a surround to the audio out, that means that is a problem with speakers contacts or with one of the outputs.
Borrow a surround or use an amplified speakers set and check if you can fix it with this trick.
To do a real fix, a technician must open the tv, and test all audio connection, and onboard connection to audio outputs to see what is wrong.
If TV is going to work with a surround you will probably get a far better audio quality than the one you get now from TV speakers.

Aug 20, 2008 | Televison & Video

1 Answer

Sharp LC 37 D6U


When you turn the tv on, do you hear a faint “pop” noise from the speaker? If so, the problem is with the heat sink under the audio IC. Over time, the heat sink will lose its consistency and start to melt, thus shorting out the audio circuit. To fix, you’d need to clean off the melted residue on both sides of the audio IC as well as replacing the heat sink with a newly redesigned Sharp Heat Insulation Pad. It’s a pretty complicated fix, I suggest calling your local authorized sharp service center to fix this problem. The part is inexpensive, so you’re most likely looking at a labor charge (maybe around $200ish) for the repair if they are not marking up the price too much.

Sep 04, 2007 | Sharp LC-37D6U 37 in. LCD Television

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