Question about Hitachi 57F500 57" Rear Projection HDTV-Ready Television

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Spots on screen

As I was cleaning the screen I noticed 3 very small spots that at frist looked as if they dropplets from the cleaner. The largest is about 1.5mm in diameter the smallest .5 mm dia. Right side of screen from center to the upper right corner. My guess is that there is something on the mirror? Any suggestions, Thanks in advance

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Re: spots on screen

If it looks fluid it's more likely something like windex or whatever you were using to clean the outer fresnal screen with got between the fresnal and lenticular screens. There are actually two screens there sandwiched together...

Posted on Dec 09, 2007

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Hi, LCD screen is quite different with crt screen. You should be careful while do cleaning. Unplug the power supply before do cleaning.
How to clean lcd screen: You can use isopropyl alcohol, hexane, petroleum benzine, glass cleaner with ammonia free.Apply the liquid to soft and clean cloth then wipe your screen. Repeat the steps until your lcd clean
Grease look on screen? Just use dampen cloth with water instead use above liquids as the may smear the contaminant across the screen.

Regards, Jay

Jan 20, 2011 | Hitachi 57F500 57" Rear Projection...

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Blue dot on screen really small but noticable if you know what your looking for wondering if its a problem with the projection or if its a quick fix

If it's a CRT projection TV, it could be a burned spot in the phosphor of the blue crt. If it is a burned spot, I don't beleive there's a fix.

Oct 20, 2009 | Toshiba Projection Televisions

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RU -44, small "pink" spot on screen.

Green is missing from the area where you see the pink (actually magenta) spot. This might be due to a large amount of dirt on the green lens. It may be due to damage to the face of the green picture tube. You need to remove the front screen so you can look into the lens and determine that.

Depending on the make and model of TV, the screen may be held on by snap fasteners and come loose when you pull on the plastic bezel surrounding it. Or the bezel may pull off to reveal brackets screwed into the cabinet that secure the screen. Or there may be a trim strip under the screen that pulls off to reveal screws. Remove those and the screen will swing up and off.

Once you can see the lenses, clean them with a soft rag and glass cleaner. With the set on, look down into the lens and you can see the face of the picture tube. If you see a dark spot on the face, the tube is damaged and would need to be replaced

Apr 22, 2009 | LG RU-44SZ61 44" Rear Projection...

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

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.

Oct 16, 2008 | JVC HD-56FN97 56" Television

2 Answers

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.

Sep 29, 2008 | JVC HD-52G786 52" Rear Projection HDTV

4 Answers


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

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Spots on the screen

Really dusty house, hey,,,, Take apart screen assy and vacume then dust with microfiber clothe. Use can air and brush to clean fans. Dust is enemy #1 to all DLP tv's

Jan 03, 2008 | Samsung HLP4663W 46" Rear Projection HDTV

2 Answers

Looks like dust spots behind screen

I had the same problem and had a tech check it out.
It turned out to be dust on lens and mirror.
cleaned them and good as new.
Ihope this works for you.

Dec 29, 2007 | Sony Grand WEGA KDF-50WE655 50" Rear...

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Blue spots on the screen

why do i have blue spots on my grand wega small blue spots that flicker like stars shows up with black backgrounds it sounds like sony dont want to make good on there products by admitting they have a problem i had it cleand like they said witch cost me more money and spots are still there last time i by a sony.

Dec 01, 2007 | Projection Televisions

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Screen spot

Since you have a black spot,you need to look at the mirror or inside screen. If it were a certain color, like purple or yellow, for instance, I would suggest a lens or picture tube, but, since it is black in one spot, I would suspect debris in those areas.

Dec 12, 2006 | Toshiba 51H84 51" Rear Projection...

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