High Def Forum
Thank you for visiting. This is our website archive. Please visit our main website by clicking the logo above.

Shadows on screen

11-18-2007, 03:23 PM
I have a 56fh97 JVC TV. I've had the TV for about a year and it's been great. While watching hockey in HD I noticed some dark spots on the screen about the size of a golf ball.

They almost look like shadows. They're definetly on the screen or behind it. I've tried washing the screen with mild soap, delicate cotton and a damp cloth rinse. The spots are still there.

When I look really closely at the TV screen I see no dirt or discoloration. What could these spots be? dirt on the inside? Bad mirrors on the screen, or ???

for the first wise guy that asks, no I haven't been hitting golf balls in the family room :)



11-20-2007, 11:45 AM
Wow, someone with the same problem as me. I don't have my model number handy, but I bought my 56" JVC HD-ILA in July 06 and it's still on the original bulb.

It's like a faint shadowing, with some small spots, that remain constant. Mostly noticable during a panning image where everything is easily seen moving behind the smudges. I can see why you'd notice it during a hockey game, that's a perfect example of the type of thing it shows up on the worst. My screen looks pristine on the outside. I've never used anything but a microfiber cloth on it. Could it be dirt on the inside?

I also have noticed when there is a pure white background there is some yellowing in the middle area of the screen, stretching from side to side. It's an irregular blobish shape. Only notice it on pure white backgrounds or on a black & white image where it just seems discolored. It's faint, but annoying.

Any ideas? Bueller? Anyone?

01-09-2008, 12:20 PM

Pretty simple cleaning.

01-22-2008, 03:04 PM
Thanks for the info, I will try this tonight!

I wonder if it will fix my yellowish blob...

01-22-2008, 07:03 PM
I wonder if it will fix my yellowish blob...

That sounds like a light engine problem.

01-31-2008, 02:24 PM
Well, I must say that there was a TON of dust in there. The picture is vastly improved. :banana: My yellowish blob is very faint, always has been, and now is even fainter. I can hardly notice it now, even on pure white backgrounds (but I bet I do have a light engine issue I'll need to address down the road).

There was so much dust in there... my arm was to big to reach in far enough to get to the lens so I used one of those flexible reacher thingies with the spring loaded claw on the end to hold a lint free cloth and dust off the lens.

I could see some dust particles on the inside of the screen and lots of dust everywhere else. My next plan is to open the access ports on both sides, stick the end of a 3" shop vacuum hose in one end while I blow a can of compressed air in the other end. Hopefully that will stir it up and suck it out...