Question about JVC HD-56FN97 56" Television

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Gray spots on screen on a JVC HDILA model HD 56G 787

I have a JVC HDILA model HD 56G 787. I love this TV more than any I have ever seen. However, I have recently (in the last couple of months) noticed slight gray spots near the middle and near top of the screen. The spots are not TOO dark, but can be seen on a white or light colored screen. It almost looks like there is dirt or dust on the screen, but the screen is spotless. Have you heard of this, and what do you think can be done about it? Also, the lamp has been replaced about 2-3 month ago, but it think that it was doing this even before the lamp was replaced. I appreciate any insight. Thank you. 1 large gray spot in the lower middle of the screen. I, too, just recently changed the bulb and that's when it started. I've tried cleaning the bulb but that didn't change anything.

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  • CapsFan May 07, 2009

    I have the same problem, with gray spots that are dispersed across the screen and am accumulating more and they are getting larger. They are not that noticeable except with light/white backgrounds on the screen, but are very annoying now with the NHL Playoffs and the spots are getting worse. Would you think this is covered under my extended 4 year warranty that covers normal wear and tear? The set is just over 2 years old.



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  • 14 Answers

The HD-ila sets accumulate a lot of dust in the light engine. The worst offender is the little fold mirror just under the lens. I take my set apart about every 8 months or so to clean all the dust from the light tunnel and all lenses, mirrors, diffusers etc. The picture really regains it's pop when this is done. Unless you are a skilled technician though, I would recommend against attemptimg this procedure as you need to disconnect the individual color lcds. Check with a local service center to get it properly cleaned.

Posted on Dec 29, 2008

  • 1 more comment 
  • Saif Jab
    Saif Jab May 02, 2012

    How did you open you set , i tried opening it but there is nothing inside ?

  • Saif Jab
    Saif Jab May 02, 2012

    How to clean the mirrors and 3 color chips inside my jvc hd-56zr7j , cause there is grey dots all over the screen .? i bought this tv a week ago and i bought a lamp for it and it works great but the picture is a bit faded , and there is grey patches all over , i thought it was the lamp cause there is small dots inside it , but then the lamp only emits light into the mirrors so i dont think that thats the problem , what do you think ?

  • wjurls Mar 14, 2014

    The whole light engine slides out of the back of the TV. Remove the lamp, lower back panel, chassis screws, the silver metal support plate and 3 wire connectors and the unit should slide right out.



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SOURCE: Gray spots on screen on a JVC HDILA model HD 56G 787

Spots on the screen/picture can be caused by three things. Dust on the inside of the screen, on the mirror or in the light engine or optical block. The first two can be corrected by you if you can gain access to the interior. If it is the third (light engine. it will require a technician. If this answered your question, please be sure to rate the answer. Thanks!

Posted on Oct 31, 2008

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Gray spots on screen on a JVC HDILA model HD 56G 787

The gray spots are caused by dust on your lens, very easy to clean.

Power down the TV.

If you open the right side access panel (right side as you are looking at the front of the TV) you can see it in the middle, it's not very big. Using a scratch/lint free cloth, gently wipe off the lens or use a vacuum to **** up the dust being careful not to actually touch the lens.

Replace the access panel and enjoy your spot free screen.

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I fixed it!!!! If you can open one of the sides (on the JVC there is a little door with a screw), then you can clean the projector lense in the middle on the bottom. It kind of looks like a big light bulb. It seems there is just dust on the glass that is projected onto the screen. We had a big gray spot and cleaned it with a damp glass cloth and Ouila! It disappeared. I scored MAJOR brownie points with my husband for this one! He wanted to replace the TV!

Sep 25, 2008 | JVC HD-52G786 52" Rear Projection HDTV

1 Answer


kinda like a water mark... i fixed a few of these and to me it sounds like something in the optics. eather on the mirror or in the engine... send it to a shop while its still under warrenty. they probally will replace the engine for you under warrenty.

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