Question about JVC HD-70G886 70" Rear Projection HDTV

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My JVC HD-61G887 went dark- was dark when turned on. There is no sound also. I have a spare bulb. When the bulb goes out do you lose the sound also or do I have a major problem?? Thanks Bill

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  • bbbwhitley Sep 12, 2010

    When I turn it on the blue light is on-when I shut it off the lamp bulb flashes. Thanks--Bill

  • bbbwhitley Sep 12, 2010

    Blue light comes on when powered up. Lamp light flashes when turned off. Is it worth fixing or should I just junk it? Thanks--Bill

  • bbbwhitley Sep 12, 2010

    Image processor is 1,000 dollars or more aren't they?

  • bbbwhitley Sep 12, 2010

    Yes, thank you!

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  • JVC Master
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If it would have been a bulb problem you would have a flashing light on the lamp led signalling that it has failed. If the tv is completely dead then the failure is in the power source, and it's massive. The tv must be opened and tested by a qualified person. Time to call a repairman.

Posted on Sep 12, 2010

  • Azrael SRL Sep 12, 2010

    Yes, in that case it's a problem in the ballast or the image processor. To find which you must open the tv and test the voltages at the bulb - if they are ok then the ballast is ok and the image processor is faulty. If the voltage is lower than normal but still present then the power source is in protected mode because there's a short on one of its outputs. You must find out that short and replaced the failed part. Again a good experience is needed. If you don't know how to do it then call a repairman.

  • Azrael SRL Sep 12, 2010

    That's the light engine - totally different part. A new mainboard (on which the processor is soldered upon) will cost you around $250 new or $100 used, if you can find one. The tv  can be fixed, in the end all that counts is if you think that the tv is worth the money you will spend on it ; and you will spend more, be sure of that - it has started to fail apart of old age. Personally, if it would be mine, since it has never been that great from the start, i  would just junk it.

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Look first to see if lamp went in correctly, on most sets if look carefully you will be able to see if lamp fires up for even a few moments or not.

The lamp is powered by a ballast and that could also be bad, the place where it connects (usually two pins) goes directly to the ballast.

If issue is different from before the lamp was replaced you may have a new lamp that is bad, its rare but can happen.

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The most common problem with JVC LCD rear projection TV is bulb failure. Do not panic, this is normal after 2-5 years of use.

You can change the complete assembly or for less cost just change the bulb. Do not use Osram or other funny brand "rebuilt" or locally made bulb. Use a Philips replacement and all should be good.

Changing the bulb involves removing the lamp assembly and taking it apart like a puzzle and replacing the bulb. JVC are a little more difficult to do than most others because the wires on the original bulb are molded into the glass on the original bulb. Wires must be cut and stripped of insulation before connecting to the new bulb.

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Hi
Usually, if the red light is flashing and you get no picture, that means that the lamp life cycle is finished and you'll have to get a replacment lamp. the lamp has about 3000 hours of life (2 to 3 years under nomal use).

You can buy a replacment lamp from here
http://cgi.ebay.com/NEW-DLP-LAMP-BULB-JVC-FOR-HD-61G787-HD-61G887-HD-61Z456_W0QQitemZ320274762989QQcmdZViewItem?IMSfp=TL0807151554r7572

Hope this helps
Cheers

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No picture.


The lamp is turned on by a high voltage ballast, very similar to the ones in your fluorsecent light fixtures. Your ballast is starting to fail. You should have your TV serviced by a JVC authorized service center because they have the training to deal with this issue. Waiting until it fails could very likely cause more servere damage especially if it fails shorted then the power supply will need to be replaced as well.

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