Question about Toshiba TheaterWide 52HM84 52" Rear Projection HDTV-Ready Television

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Toshiba 52hm84 My Toshiba has dark spots, not black and not pixels in various shapes and sizes. picture looks great but when it is a light screen these are obvious and abnoxious.

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  • Ruley6 Apr 10, 2008

    I have the same sort of problem, Toshiba DLP 52hm84. The screen has dark spots at the bottom of the screen. Not blacked out completely, just 10 times darker than the rest of the screen. Looked like a tire skid. Funny thing is the spots change shapes, so i dont think it's pixel related either. Have you fixed your problem or found the cause? Just wondering if it's fixable adn if so, how much it'll cost me....



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It's either signal board or light engine and unless you're really pretty good at electronics neither one is something you should tackle. I do have the service manual for this unit and I would be glad to send it.. Just drop me an email and make sure you include the model number as well as what it is you need.. I get almost 650 emails a day so it's really hard to remember who's email goes with what problem. :) Good Luck Bill

Posted on Jun 11, 2007


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Spots all over screen

We will presume you have a DLP set that uses a lamp of some sort(no brand or model indicated here).

spots or dead pixels are usually a damaged optical light engine--there are ones where more and more appear.

A faint possible reason is dust is inside the optical light engine--seen it a few times but the spots are usually golf ball in size----high pressure air applied to the vents in the engine with set on in a dark room usually clears that up.

Jun 12, 2012 | Televison & Video

1 Answer

How to fix dark spot on screen?

If the dark spot is a soft-edged horizontal band all the way across the set, you have a fading Cold Cathode Fluorescent Lamp (CCFL tube). Look for flickering or a pink tint in this area when you turn on the set - if you see either of these symptoms that confirms the tube is worn out. (The dark band will coincide with a pair of pink and white or blue and white high voltage wires going to the edge of the panel assembly.) Replacement requires considerable soldering skill; you have to make a small wire connection to the leads on the ends of the tube, and you can't heat the connection for more than 3 seconds or you ruin the new tube.

If you have an irregular (roughly circular or elliptical) soft-edged dark blotch, you may have an unrepairable* problem with the LCD panel, or there is an irregularity in the reflector sheet in the back of the panel. You may be able to cheat by removing the back of the panel and placing a spacer behind the reflector sheet so you get a little more light through the dark spot - but this may cause shading of the surrounding area. Be careful not to detach the circuit board from the edge of the panel, and avoid touching the electronic circuitry - it's vulnerable to static electricity damage from your fingers.

If the dark spot has hard edges (the pixels right next to it are working normally) and is completely black, the problem may be in the electronics, or it could be broken pixels in the panel (those are not repairable). You would have to provide some detail on the shape so we can figure out where to look.

*Sometimes uneven lighting as a result of a panel fault can be remedied by gently massaging the face of the screen to redistribute the liquid crystal material, but the success rate is low. You can easily make things worse, but if you can't stand it the way it is, you haven't lost anything but some time.

Jul 06, 2011 | Protron PLTV-3750 Television

1 Answer

Small dark spot on right side of screen/lens, also showing up in photos.

Not a good sign I'm afraid to say. If the 'dark spot' is coming through into the pictures that means some pixels are not sensing light. They will look square shaped if you expand the picture on your PC.
If the lCD was faulty (or had some dead spots) this would show when focussing and taking pictures, but, would not show in the final picture.
I'm assuming you have cleaned the lens (just in case) there is a 'dirt' spot that a finger could have put there. (clean with damp soft tissue )
There is a Panasonic help site which I checked but most reported problems were USB connections and battery life etc .. Try it and ask anyway - can always ask -- Ray

Jan 19, 2011 | Panasonic FH20 Digital Camera

1 Answer

Dark spots on LCD screen

I hate to say it but what this is is contamination under the actual LCD glass. This propblem starts during the manufacturing process and can rear its ugly head over time or after running at high temperatures for long periods of time. It can also appear as dark 'tiger' stripes. There is nothing that can be done to repair this. If you have an extended warranty, the mfg should exchange the panel for you. If your warranty is up, take photos and contact Toshiba online and try to get them to cover this regardless. This is a mfg defect.

Jan 05, 2010 | Televison & Video

1 Answer

On my toshoba pc 17'' sreen I have black spot on the top corner and the bottom of my screen , is my screen diying oley one year old

There are two types of black spots. The first, I call bruising. This is a dark area on the screen that can vary in size and still allows for proper viewing. The second is a black dot. If it is a black dot about the size of the period in this sentence, it is a dead pixel. Most manufacturers allow for up to 5 dead pixels before they will treat it as a problem. In either case, dead pixels and bruising are more of an annoyance than anything. I have seen screens with both issues work for up to 5 years under these conditions. They will eventually fail but how long it takes it to fail, is anyone's guess. There are numerous outlets for new or used screens. If you plan on keeping this for a while, I would recommend contacting the manufacturer to see if they will do anything or pick up another screen and have it on hand to replace it if it should fail.

Dec 25, 2009 | Belkin Computers & Internet

1 Answer

Black spots on screen in the top corner and bottem of screen

how big are the black spots? are they pixel size? i have one black spot too but its called a "dead pixel" when ya buy laptops these days, sometimes...they will have a dead pixel gaurentee for like 25 dollars, but i didnt choose that so now im stuck with one annoying dead pixel on my 5 thousand dollar laptop but im fine with it i guess. when my screen gets bad, im rich enough to just replace the whole screen anyway. dead pixels cant be fixed i dont think just replaced by the whole screen.

Dec 25, 2009 | Toshiba Computers & Internet

1 Answer

Dark spot on right side of LCD screen in the shape of Illinois has appeared gradually over the past few weeks. Very noticable between commercial and when news channels show graphics/slides. Pixels are not...

In most of the case, the problem is a defective display LCD panel, this problem in some terminology is called PIXEL RETAINING, it means the pixels are locked up, there is no good permanent solutions for it, you have to change the LCD panel.

Jun 02, 2017 | Vizio L32 32 in. LCD HDTV

1 Answer

Dark black spots around the edges of LCD TV

this issue is tape from the edge of the panel falling onto the screen.You will have to remove the cabinet and the panel from the bezel(front cabinet).remove the screws from the lcd outer edge. Take of the tape.Be very carfull of the ribbon cable that goes to the lcd controller and to the lcd screen itself. They break easy. If you do , its over. you will need a new panel. to much money and work. best to leave it alone.I have fixed it several times for people with warrentys. It is just anoying but will not hurt your tv.

Aug 28, 2008 | Memorex MLT3221 32 in. LCD TV

1 Answer

Mitsubishi VS-60603 60 in pink spot

I have seen this before, and I can only describe it as a flaking of the phosphorus coating in one of the picture tubes. If you can, remove the back such that you can take a flashlight and look down into the 3 picture tubes. If you see any flaking or dark spots in the phosphor, there will be a spot on the screen missing that color. Unfortunately, this is not repairable, as all 3 tubes would need to be replaced (like replacing all 4 car tires when one is completely bald) and that would cost more than a new TV.

Jun 06, 2007 | Mitsubishi VS-60603 60" Rear Projection...

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