Question about Sharp Aquos LC-46D62U 46 in. LCD HDTV

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Sharp Aquos Audio Intermittent

I purchased an Sharp LC-46D64U about 2 months ago. I get a constant intermittent/pulsating audio signal on 2 over-the-air high def channels (2.1 & 7.1) even though the signal is strong. Sharp customer service had me install Firmware Upgrade U0709111 which did not help. Has anyone else had this problem and gotten it fixed? If so, how?

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  • suthemb1 Aug 06, 2008

    My Sharp Aquos LC46D62U is having Sound problems. It seems to be dropping every fourth or fifth word. COMCAST says it is not a problem with their equipment. Any ideas?

  • pdebotton Feb 22, 2009

    I had one channel 16-1 the audio was so bad that I couldn't use that station. Station 16 has the same broadcast 16-1 & 16-2 so I use the 16-2, this was a problem from the 1st day I received the TV, I called Sharp and they told me that it was a station problem via my Antenna. They recomended that I purchase cable. I have 3 other LCD TV's in the house and they have no problems with 16-1 audio. 5 months later, today I now have 4-1 statrion with the same problem, I think that itys the HDTV tuner, but Sharp is holding on the broadcast signal, No other TV's in the house have this problem, and they are all off the same antenna, I even swapped the TV locations and the problem moved with the TV. So does Sharp want me to give up and goe away. I did purchase a 5 year extended warranty and will call it in next week. any ideas?

  • Anonymous Apr 06, 2009

    I have a 13" Sharp Aquos and I have the same problem. 2 channels don't have sound and a few others have a skipping problem now and then. I am certain it isn't the cable TV signal. There are so many other complaints floating around the internet, that it must be a huge Sharp defect. A friend of mine has a Sharp and his sound died a few months ago. His is a big TV hooked up to digital cable, so he just decided to add a surround sound system to avoid the cost of repair. Mine is a small kitchen TV, so I can't go this route. Anyone have a solution out there?

  • Anonymous Mar 31, 2014

    After clicking ok to update it says will go black before update screen appears and it goes black 2 sec later channel comes back on and no update

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  • 17 Answers

This is a problem with the ATSC channel's reception. Usually switching to another channel and back solves the problem.

Posted on Feb 20, 2009

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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.
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Here are some other things to check:
1) Replace the batteries on your remote control.
2) Try resetting the logic functions on your tv by unplugging it for a minute, then plugging it back in.
3) Try covering up the infra-red receptor on the front of your TV to see if you're getting unwanted signals from the receptor. taping a piece of foil over that area is perfect. If it doesn't stop after doing these two things you'll probably need to take it to a shop.
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