Question about Sanyo 42 in. LCD TV

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I just bought a sanyo dp42841. I used to have the same tv in a smaller size. The first tv was hooked up to the cable and worked fine. When I attached the same cable to the new tv it's not able to find any channels.

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  • Master
  • 373 Answers

Be sure your cable is hooked up good and if you did not auto scan you must do this (auto scan) Found in the menu setup. Use the remote and press menu and it is usually found easily. Highlight the auto scan and start the scan usually by pressing volume +

Posted on May 20, 2011

  • 2 more comments 
  • cookordie3 May 20, 2011

    I've done that several times. It occasionally finds a digital channel or two, but none of the analog channels I used to get are found. I would understand if it was all or nothing, then it just might be a defective unit. But it's throwing me off that it can pull something in. Is it maybe something to do with the type of cable, I'm using a cheap coaxial. Or maybe some kind of update in the technology I'm not aware of.

  • TV Doctor
    TV Doctor May 20, 2011

    From my experience working with TV's for 30 years...I gather that if your cable is still the same the you are probably right in thinking you have a defective unit because the micro processor is not recognizing all the signals of the cable which is possible with the new type of tuner processing. However it comes to my mind that you may have two cable connections as some LCD TV's do have. One for digital and one for cable or they can be put together also into one connection. Another thing you can do is bypass the tuner and use the RCA cable with the red, white and yellow plugs. That is if you don't have cable direct into the connector. I mean using a cable box and coming from the back of the cable box or satellite box (if you have satellite) and going to the corresponding jacks on back of the TV.

  • wgsa001 Aug 19, 2011

    I just bought a DP42841 and I am experiencing the same setup issues. I'd rather use the HDMI cable. did cookordie3 ever solve their issue

  • JohnPjr Aug 29, 2011

    Your cable box is the tuner, you should be able to switch channels thru the cable box whish in turn will send the signal down the HDMI cable to your TV

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How do I turn off the internal speakers on a tv Sanyo DP42841


does the remote have a MUTE button ?that is the only OFF there is

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HDMI input works ok. Hooked up external antenna. Did channel scan. It will only scan for analog channels. Has analog raster on screen. It has no information on menu page for digital channel scan.


do you have the air option in the scan menu see
http://tv.manualsonline.com/manuals/mfg/sanyo/dp42841.html
page 9 important fact cable digital gets wiped by air digital channels

You may be able to get around this via a digital hd tv decoder box and then have it on a hdmi input on the TV as a backup to the cable if you can't have both cable digital channels stored and aerial digital channels stored

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Roger, you might try this.. on some TV's it works. while it is unplugged push the power button on the TV and hold it in for 30 seconds or more. sometimes this Resets the tv back to Default setting. Hope this helps besides even if it doesn't work you haven't hurt anything or lost anything..

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Check all the cable connections to audio board for any loose connection. During long term storage, this might have happen. Reset all that cables comes to go out from it. If it do not help you, check the speakers. If all found OK, replace the audio output card. If you wish to get some details, check the site linked here. http://electronicshelponline.blogspot.com/Pull up older posts. Check the site in 'Mosaic' view.It will make search easy. Check its audio settings too. Whether it is muted or not.

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More than likely your power supply board is damaged. The scary thing about TV's that get damaged as a result of T-storms is that multiple boards can get damaged. I would suggest taking it to get it diagnosed properly instead of the 'guessing game". That game could cost you more in the long run.

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Today a bought a sanyo dp42841. I have run through the setup 12 times and no analog or digital channels can be found. My connection is from the HDMI port on the back of the DirecTV converter to the HDMI...


since you are using hdmi input, and have a direct tv reciever, you are not using the tv tuner,therefor it will not store any channels. all the channels are stored in the sat reciever. switch your input to hdmi 2 and you should see the direct tv box. dont worry about the tv stroing any channels, because it wont, all the channels from the direct tv box are in video format not rf.

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sound like a tuner problem. there is a resistor that goes to the tuner that could of went bad 39,000 ohms i think which should have a orange white orang strips around it and a gold. anyway there is a problem with tuner. Sanyo was good about haveing a problem with tuners in there smaller sets. If you do not know anything about how to repair you probly shoud take to a shop but the total cost might be high and not worth it in the long run. think before you jump still water runs deep.

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Poor reception


It sounds like a problem with the tuner in the TV set. Hook up a VCR through the video inputs and hook the cable through the VCR and if the picture is still snowy, the problem is the cable. If the picture is clear, the problem is the tuner in the TV set. If you wanted, you could simply leave the VCR attached to the TV set and change cable channels through the VCR, or have the TV serviced. Good Luck

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