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

12 Answers

No sound on tv or dvd

Turned tv off monday night. no sound tuesday a.m. Dishnet says it is the TV, Sharp/Aquos says its the tv. Techie says its a fuse. Must remove back panel. Unable to get panel off. Repairs to cost $500 plus or minus according to two repairmen I spoke with. They scoff at the idea of a burnt fuse. why? Also, techie told me the fuse is 1c33 0 ohm. What does this mean? Radio Shack didn't know wht I was talking about! Help!!

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  • winksy Sep 18, 2008

    The advice was not aimed at a solution. Rather it just said beware of repairmen.

  • winksy Sep 18, 2008

    WE have tried that. There is no sound in the DVD either.

  • winksy Sep 18, 2008

    Problem: 26-month old 37" Sharp Aquos Model# LC37D4U lost all sound. Same is true of the DVD player. There were no warning signs. I turned it off Tuesday night. On Wednesday morning I turned it on. No sound of any kind. Someone suggested a burnt fuse in the DM Board...or inverter board. I can't remove the back panel, however. Others opined that it was probably NOT a fuse. Serviceman gave me a $500 plus or minus estimate for repairs...but without any concrete ideas until he comes out here at a cost of $100 just to "look" at the problem. Help! Thanks!!

  • winksy Sep 18, 2008

    Guru, how do I go about asking a tv techie to replace the defective board? thanks.

  • winksy Sep 18, 2008

    tried that, unfortunately, still no sound.

  • winksy Sep 18, 2008

    especially interested in mohammed 387's suggestion but lost it unfortunately. Resend, please?? Thanks!

  • winksy Sep 18, 2008

    muhammed387 will you please repost your suggestions?? thank you

  • winksy Sep 18, 2008

    the tv menu will not allow us to change the redirect outlook. We click on it and nothing hapens

  • winksy Sep 18, 2008

    thanks. Is muhammed357 or is it 387? still out there? I found the advice interesting and would like to pursue it but accidentally lost it. thanks!

  • winksy Sep 18, 2008

    no sound anywhere!

  • winksy Sep 18, 2008

    tim nolan, how do i send you my email address?

  • winksy Sep 18, 2008

    need to hear from tim nolan or mohammed357 [387?] please. thank you

  • winksy Sep 18, 2008

    experttv, can we fix this ourselves or do we need to hire a repairman? Do we have to take the back panel off the tv in order to do this? if so do we need special tools? thank you!! winksy

  • winksy Sep 18, 2008

    thanks to everyone who helped, especially mohammed387, experttv and maklean, etc.

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12 Answers

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I think best way is to take it to an authorized service station to troubleshooting and estimate the cost and parts need needed to repair audio circuit. Normally the cost will be reasonable.
To troubleshoot yourself and replace components is difficult if you have no previous experience in repairing electronic printed boards and you must have at least some basic tools and instruments.
According to repair cost estimation you can have a correct decision what to do next. Good luck!

Posted on Sep 18, 2008

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  • 203 Answers

There is a knowen problem for this with your model and there is an update needed. I just fixed one of these yesterday with this exact problem. On the back of the audio out IC the heat sink fails and causes no sound. If you give me your email address I will send you the PDF file on what needs to be done to correct the problem. Let me know!

Tim Nolan

Posted on Sep 18, 2008

  • experttv
    experttv Sep 18, 2008

    post it on here or email me at experttv@comcast.net

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  • 147 Answers

There's usually only 1 fuse in a TV set, right near where the line cord attachs to the main board. If it's blown, you won't have a picture either. Since it sounds like you have a picture, it's not likely the fuse.

It may be something as simple as a loose connection from the audio processing chip or amplifier to the speakers.

If your TV has "line out" connections, you could try hooking those up to a stereo or computer "line input" using a pair of RCA cables to see if the audio chip in the TV is still working. If you get sound out of some other device, I'd guess the amplifier circuit needs attention - maybe a couple transistors need replacement. $5 for parts. If the "line out" is dead too, then the audio decoder chip may be cooked. Resoldering surface mount stuff like that is an acquired skill - best left to experts, who would more than likely swap out the bad audio board completely.

Also, there may be a setting in your TV's menu to redirect output - or even mute when closed captioning is enabled - that may have been accidentally changed.

Posted on Sep 18, 2008

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First off how long have you owned the television? The sound doesn't work on any of the inputs? You can still adjust the volume? Also make sure that in the options that speakers aren't off. If you still have a problem your only real option is to have it repaired by a professional. Unless you are willing to take a chance doing further damage. Being that you can't get the back off it is a job for a professional. If you still have any questions let me know. If you have a moment to accept and rate accordingly it would be appreciated.

Posted on Sep 18, 2008

  • Lee A.
    Lee A. Sep 18, 2008

    Not sure how maklean got the rating but good luck.

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It may be shorted out and that the fuse needed to be replaced. 1c33 0 ohm is fuse code number used in ur televisio..it may be 2-5amps fuse
Look inside the TV and see if you can locate any other large power transistors in metal (TO3) cans or plastic (TOP3) cases. There may be a separate transistor that does the low voltage regulation or a separate regulator IC. Some TVs have a switchmode power supply that runs off a different transistor than the HOT. There is a chance that one of these may be bad. If it is a simple transistor, the same ohmmeter check should be performed.
If none of this proves fruitful, it may be time to try to locate a schematic.
A blown fuse is a very common type of fault due to poor design very often triggered by power surges due to outages or lightning storms. However, the most likely parts to short are easily tested, usually in-circuit, with an ohmmeter and then easily removed to confirm.
If you find the problem and repair it yourself, the cost is likely to be under $25.

Posted on Sep 18, 2008

  • mohammed marika thambi
    mohammed marika thambi Sep 18, 2008

    it may be shorted out and that the fuse
    needed to be replaced. 1c33 0 ohm is fuse code number used in ur televisio..it may be 2-5amps fuse


    Look inside the TV and see if you can locate any other large power transistors
    in metal (TO3) cans or plastic (TOP3) cases.

    There may be a separate
    transistor that does the low voltage regulation or a separate regulator
    IC. Some TVs have a switchmode power supply that runs off a different
    transistor than the HOT.

    There is a chance that one of these may be bad.
    If it is a simple transistor, the same ohmmeter check should be performed.



    If none of this proves fruitful, it may be time to try to locate a schematic.



    A blown fuse is a very common type of fault due to poor design very often
    triggered by power surges due to outages or lightning storms. However,
    the most likely parts to short are easily tested, usually in-circuit, with
    an ohmmeter and then easily removed to confirm.



    If you find the problem and repair it yourself, the cost is likely to
    be under $25

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The audio circuits on these sets rarely have isolated fuses. There are a number of possible causes for this symptom. I'm assuming that there are no other problems with the set. Since you can not take of the back, there is little that we can suggest that you do. The $500 seems a bit excessive unless that includes a replacement board.

I looked up your model and the power suplpy board will net about $150 or so and the main board around $350. Given that the lack of sound is the only symptom, I'd recommend looking for a service shop that can do component level repairs. There should be no reason to change the entire board. The output amp chip may be faulty and should be available separately for a cost of $20 or so.

Keep us posted.

Dan

Posted on Sep 18, 2008

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If by Dishnet, you are referring to Dish Network, that is most likely the source of the issue. We had same exact problem when phone line was hit by an electrical surge. We were told everything was wrong from the television to the telephone, to the phone line, etc. Finally, when we detached the DishNetwork equipment, we were able to prove that the DishNetwork equipment was at fault. It is connected to the main phone line as part of the agreement (something to do with DVR). At any rate, once DishNetwork was convinced (following verification by telephone company of all other phone connections), the DVR was tested online by their folks. They sent new DVR unit, we replaced, and all was well again. [Please allow me to add that I am NOT a television expert - I am relaying to you the facts of an identical situation in our home that occurred within the last month, hoping that it will be helpful to you.] Thank you!!

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Posted on Sep 18, 2008

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I don't think with out schematics and proper work bench any expert can solve its no sound problem.
TV repair guy is good choice in such situation and if you think tv has worth to spend 500, call them. Do it yourself would be an adventure if you have no knowledge of electronics and could be end upon worse or mess.
I would suggest to buy required parts from HERE on comparatively low prices and ask tv tech person to replaced defective board.

Posted on Sep 18, 2008

  • Shahid Electronics
    Shahid Electronics Sep 18, 2008

    my suggestion is ask tv tech to identify defective board, get that board on my recommended shop on very low price and replace it. now pay tv tech service charges and save reasonable amount.

  • Shahid Electronics
    Shahid Electronics Sep 18, 2008

    I need bit info, do you get sound signal at Monitor out terminals of tv? you need to connect any amplifier type device to amplify monitor audio out signal.

    if tv has headphone jack, plug headphone and listen is there sound?

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If you look at the fuse again if it is blown then it is a draw issue on the power board a dead short that over draws amps.

So only techie might have told you about burnt fuse .


Regarding fuse 1c33 0 ohms
It is located approximately 2 inches behind the tuner The surface mounted part has various markings on
the original part from “105” to “F”
and is located below the board marking “7C32'


SAM ANDERSON

Posted on Sep 18, 2008

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If its the fuse its not that costly as the repairmen stated you.
as per my knowledge its some tracks short on the main powersupply board which are supporting the tv for producing sound.if the tracks are short the board has to be checked which track is short and the capacitors or ic on that track has to be replaced.and if the whole board is repaired that can cost you about $500 that is possible.but as you said no sound is coming so the whole board must not be faulty.and for the fuse it is located on the main power supply board it is very small and looks like mini tube light and made up of thin glass.and it is not that costly.
you can replace the fuse if you have the proper knowledge to open the tv.

feel free for any further queries.
thanks.

Posted on Sep 18, 2008

  • masterexpert Sep 18, 2008

    the fuses are very cheap they will not cost u much for replacement try that first if not worked then go for the board reparing.

    thanks.

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Try to disconnect first the Dishnet and play a regular DVD on your DVD player. Check if the sound works. From there you can isolate the problem if its the Dishnet that is causing the problem.

Posted on Sep 18, 2008

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I dont no much about the tv you have but a tv expert will come along soon but i wanted to say looks like the repair guy is taking your money for a ride dont be fooled by them ok one of these experts will provide you with details how to get to the fuse and what that fuse ment


cya chris

Posted on Sep 18, 2008

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