Question about Panasonic PT-51HX40 51" Rear Projection Television

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Picture is getting darker and darker

I've had my TV for 6 years and 2 months and have enjoyed it a great deal. I've just noticed (in the last month) that the picture is dark. I've adjusted the contrast, color and brighnss, with no luck. The tv has not been moved outside of this room. Thank you so much for any ideas. A tv man today told me just buy a new one, there is no way to repair it.

Posted by tina wilson on

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Anonymous

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If the tv has never been service before you could have dust on the 3 tubes,this will decrease the brightness to the screen. try taking the front or back off & see if you can see the top of the picture tubes. remember to unplug the tv & to clean spray the cleaner on the colth , then clean the tup of the tube. never spary on the tube itself. hope this works for you.

Posted on Nov 04, 2006

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on Nov 22, 2010 • Health & Beauty
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Our LG tv has started making a vibrating whistling sound when you first cut it on, you can hear it get faster and faster then slowly goes away.. Also over the past few months I've notices the picture

the picture getting darker means the lamp has aged and u need to replace it another thing u need ti replace the mirrors in the light tunnel of the light engine they have faded secondly the noise means the colour wheel has aged you need to replace it u will have to replace the whole light engine cos the color wheel comes inbuilt the light engine and u will be ok ontact lg dealer in your area
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Phillips 47PFL422D/37 I've had the tv about 6 years with no trouble. But now the picture is to dark to watch it also pulses. I've tried to unplug it and plug it back in I get a picture for

First, average life on these sets is about 3 to 4 years at best and only boards are sold so even if you can pin point the board (no individual parts are sold) it is likely if will not get fixed and doing so is a bad investment as all the boards are now old.
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We purchased a Samsung LN46C630 less than a year ago. Within four months we noticed that the speakers would fade away and return at sporadic intervals, some quite long. Since then it seems to getting...

THE PANEL THAT DARKENS IS A DEFECTIVE PANEL TRY LIGHT PRYING TWO OPPOSED DIAGONAL CONERS OF THE TV WILL ITS DARK IF YOU MANADGE TO GHANGE THE IMAGE QUALITY PANEL IS DEFECT FOR AUDIO EITHER ITS THE SOURCE THE MAIN BOARD OR SPEAKERS
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I contacted Sony directly. They were able to help me and didn't try to rip me off with some plan I didn't need.
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Screen getting dark

If you have never changed the lamp this is more than likely the issue, as the tv ages the lamp looses brightness. Most lamps are rated for 3000-5000 hrs of use. Replace the lamp assembly part # UX21514 and you will notice a much brighter picture. You do not mention if the tv plays the right colors on the entire screen. These have had light engine issues.
Good luck with it
JOTVGUY
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JVC TV THE PICTURE IS DARK EVERYTHING ELSE WORKS GREAT

there so many things which can cause that to happen an these are thwe following,
i a tube has to be tested
ii a line transformer
iii vedio amplifier
this tests can be done in w/shop where other tvs are of the same.
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Picture getting darker

The tv has a room light sensor,
shine a bright light at it , does picture get brighter?
other wise when it is cool open the bulb door , is it coated or blackened, Don't touch bulb at all.

and a heavy covering of dust on internal mirrors will cause the same effect.
you will need help to clean it.
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Blue area near center of screen

Uh Oh! blue screen of death. Your light engine has warped a little from overheating and is distorting the picture.

My suggestion to you is to get on the phone with hitachi and start complaining, then keep complaining until they agree to pay for it. You may have to get the problem diagnosed by a pro before they agree to pay for it though.
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