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

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Vertical lines I have a JVC HD-70G886. Today when I was watching it vertical lines appeared in about 5 areas across the screen. I checked input sources and it was the same for all. I had replaced the lamp about 2 months ago and it has worked great until this. I unplugged it and let it cool for a couple hours. When I turned in back on the same lines showed up about 15 seconds after I turned it and seemed to get worse. Is it a power supply problem? Any suggestions?

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Re: vertical lines

Get some freeze spray from radio shack then try placing a little spray on each chip on the video board and power supply board and each time you spray a chip look for the picture to clear up. When the lines go away you have located the bad IC.

Posted on Jul 22, 2007

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You never should have to but if you wanted to you would have to disassemble the entire front. That could be as easy as a few screws or taking the whole thing apart depending on your model.

Aug 22, 2014 | JVC HD-70G886 70" Rear Projection HDTV

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Green and Red (thin lines) across entire screen [JVC 70 G886 HD TV]. Screen went to all green (wide and thin) within 1/2 hour and picture hasn't come back. "Input selection" box is visible and clear...

Try a "hard reset" first by unplugging the set for 30 seconds. and if no help, you may have a problem with the SMPS power supply, it might have a bad capacitor or two by now. Worth repair if engine is good compared to a flat panel.

Apr 22, 2014 | JVC HD-70G886 70" Rear Projection HDTV

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4 thick black vertical lines showed up on my hd-70g886 today. any cheap suggestions? or should I throw it away?

That is a defective Digital Light Processor. It is part of the Light Engine Assembly. I definitely recommend NOT repairing it. Average cost to replace is around $650.00 if still available. Mfg's want DLP sets off the market for to many problems.

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White vertical lines across the screen. Why and what can be done? Thw white lines appear and stay all the way across the screen. They are about 1.5" inbetween each vertical line,

You have a failure in the vertical circuit. Service can run between $75 to $150 depending on your area.(In home repair will cost more) If set is older then 3 years and under 27" recommend replacing it.

May 06, 2010 | Mitsubishi WD-62327 62" Rear Projection...

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Vertical lines appear on the screen.

It appears like there is a bad capacitor in the horizontal circuit. Try to put a fan near the ventilation trap, just for a test.
the part cost almost nothing but having someone to your house is expensive.
Your decision.

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Wobbly lines on my Toshiba TW56X81

This sounds like a input problem. The source of the signal may not be well matched to the expected input spec. To test, see if the "SETUP" menu items are clear. If so it is something to do with a cable, connector, or configuration of the source.

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Vertical lines problem

On your blue tube there is a crt broad that may have a bad capacitor 4.7uf 250 volts most likely it can be leaky not able to hold correct charge also it might have video ic on same broard breaking down, this will cause your problem unplug crt broad from bottom neck of tube turn set on see if problem goes away if so then it means you have problem with crt broad or it could be your tube.Hope this helps you out!

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