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I have an Olivia lcd 42 - Televison & Video

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  • damonsax Apr 12, 2011

    Olivia 42" LCD TV - LT42HVI



    I got a new cable box, and while unscrewing the cable from the TV the female connector inside the TV unscrewed itself and twisted the wires that connect it to the mainboard. So it will no longer display when connected. However I have been uesing the HDMI input and tried all other input methods and now after about an hour of use the screen starts to get squirlly and then goes black. A light tap on the screen and the picture comes right back on. Happens everyday for the last 2 weeks, so I want to fix this problem. Kinda funny that we're still smacking TVs in 2011..

  • damonsax Apr 12, 2011

    Well what happened is that while unscrewing the cable wire from the TV the female cable connector unscrewed itself and the wires inside twisted around, perhaps broke off to I could see it very well when I opened the back because I couldn't figure out how to take it apart to see the mainboard. But I saw the wires twisted inside. Now the cable input will not display. But, and it may or may not be related, I have tried the other types of inputs and they all work, EXCEPT that now after an hour or so of viewing the screen starts to get squigly lines and then goes to black, sound ok. It stays that way even after turning off the TV and turning it back on, BUT a little tap with my hand on the TV and instantly the picture is back up for another hour or so.

  • damonsax Apr 13, 2011

    Can you describe how to open this TV, find the short, and ultimately fix this problem without hiring an expensive repair shop to do this work for me? I know how to solder, but what other tools, parts, will I need? THNX

  • damonsax Apr 13, 2011

    can you describe the removal of the back housing to get to all this, I wasnt able to figure this out.

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  • Master
  • 1,140 Answers

Hello -

I think you may have accidentally pressed the 'submit' button before you finished writing your question. Please can you let us know what the problem is and the full model number of the TV. If you don't know the model number, it will be on a label on the back of the TV.

Thanks,
BElectric.

Posted on Apr 12, 2011

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  • DILLIGAF
    DILLIGAF Apr 12, 2011

    ...

  • DILLIGAF
    DILLIGAF Apr 12, 2011

    Thanks for getting back to me. Sorry about the "..." comment - it was a test as I was having problems posting messages.



    The symptoms you describe could only be caused by a loose connection or a short. Whether or not this was caused when the RF connector broke off is difficult to determine, but something related to this may be shorting somewhere. A wire or small piece of metal may be causing a short, but only when the components have expanded a little through heat when the TV has been on a while.



    Tapping the screen seems to be enough to temporarily break the short. Alternatively, it could be a loose component or connection anywhere between the main board and the panel. Basically, somewhere in the display circuits.



    If you have a DVD, VCR or game system connected to any of the external inputs on the TV and this was working shortly before the RF connector broke, it's more than likely the problem is related to the broken RF connector.



    Finding the cause can only really be done by opening up the TV. I'm trying to find a service manual for this TV or a way of determining the cause without opening it up. Unfortunately, Olevia went out of business a couple of years ago and it's difficult to get the service manuals for these.



    You'll have to give me a few hours to look into this. Hope that doesn't inconvenience you . . .

  • DILLIGAF
    DILLIGAF Apr 13, 2011

    You need to start by checking the broken RF connector for a stray strand of wire or a small piece of debris that may have lodged itself somewhere on the main board. I'd also suggest uplugging and replugging the block connectors to and from the main board.



    The problem at the moment is telling you how to get to the main board. I need to track down the service manual for this TV (or a clone) as all TVs are different. I've got several Olevia service manuals but none are applicable for dis-assembly of this TV.



    I've put in a request for the SM in a few places, but I might not be able to get it until the morning at the earliest. I hope this doesn't inconvenience you - you are welcome to ask another FixYa expert if faster results are essential, but there's still no guarantee of getting the answer quicker.

  • DILLIGAF
    DILLIGAF Apr 13, 2011

    After all that, there is no service manual for this TV. Can't even buy or order one and Olevia went out of business a couple of years ago so can't get one from there either. Doesn't matter too much - I figured out how to access to the main board, etc anyway. You said you'd already removed the back of the TV, so I guess I can skip that bit.



    Please disconnect the TV from the power supply and leave it for about half an hour before opening it.



    With the back removed, this is what you should see. The 'box' containing the main board and tuner board is outlined in green. The power supply (PSU) is outlined in red.










    There are several screws around the top edge of the box (ringed in red below). There are 3 on each side and possibly a couple more top and bottom. With these screws removed, you should be able to remove the cover and access the main board and the tuner board. You should be able to remove the cover and slide it out without disconnecting the cable that runs across the back of the box.



    Take care around the PSU when removing the screws on that side.








    With the cover removed, check around the broken RF connector for a stray wire or anything else which may be making contact somewhere on any of the boards in the box. Also check inside the box for any debris from the broken RF connector and make sure all the plug-in connectors to/from the other boards are pushed in firmly.



    Hopefully, the cause of the fault will be obvious once you get inside the box. I'll wait to hear back from you . . .



    Please note: You will need to click on "View More Comments" in the light-blue bar below this message to see further messages from me. This wont appear until next time I post a message.

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