Question about Toshiba 46H84 46" Rear Projection HDTV-Ready Television

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Dark screen at top of TV picture

The picture area has an opaque dark area at the top of it measuring 2" at left side going to about 3.5" at the right side. Could this be caused by the close proimity of the center surround sound speaker?

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Re: Dark screen at top of TV picture

If this is a projection set then a center channel speaker sitting on top would have no effect.

Posted on Feb 04, 2007

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Dark picture

you know it sounds like the same problem i had....
look this is something you can try.... "turn the tv off and unplugg it!!!"'ll need to take out the lower front part of the tv......(where the speakers are to be exact) on each lower end you will find 2 screws..Be careful it will open to the side and there are many wires, i suggest you mark them to know where to put them back...then right in the middle there will be a black cover with about 5 screws..take them out....and look at the very bottom you'll see a thing with 6 pegs....the top ones are for the screen "DO NOT TOUCH THEM"...the ones on the bottom are for the adjust them...the left one it's for blue, the middle one it's for green and the last one it's for red...

I had the same problem after i moved....and after i re adjust that the tv looks super...
i hope that helps..:P

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Dark shadow

Uh Oh! Your light engine is warping a little from overheating and is distorting the picture. It usually means replacing the light engine.

My suggestion to you is to get on the phone with Samsung 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.
Hope ya fix it!

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2 Answers

Curved blue lines on screen.

You have a completely different problem. The screen voltage for the blue picture tube is slightly too high on your set. This will put fine lines in the background of the picture, called retrace lines. This is very common and easy to correct. Remove the front speaker cover and the access panel behind it. Look inside and you will see a black box with six controls, each control having a little white glue on it. This is the Focus/Screen block. Three controls are labeled Focus and three are labeled Screen. The screen control in the center is for green but I am not sure if the screen control on the left or right is for blue for your model. With the TV on, set it to VIDEO 1 but do not connect anything to the VIDEO 1 jacks. This will produce a pure dark picture, showing any faint lines in the background. Choose one of the screen controls and increase (turn clockwise) it slightly. If the blue lines do not get brighter it means you are turning the red screen control, so put it back where it was and choose the other screen control. When you find the blue screen control, decrease (turn counter-clockwise) it until just when the blue lines are gone. If you want you can check that the red and green screen controls are set to just below the point where their faint lines are visible. When done, replace the panels and your picture will be back to perfect.

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1 Answer

Dlp has dark blue areas on screen

Have you tried magic focus? if that doesn't work
replace the pcb convergence board,, It costs $96 and takes 10 minutes to replace you will have to manually line up your convergence afterward as the settings go to factory default. Everyone that owns this set has or will have to replace this part within 3 years
Or Vance baldwin online
Part number bp94-00155a

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Dec 27, 2007 | Hitachi 57F500 57" Rear Projection...

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I have the same problem and was told by a technician that I need to replace the light engine. Probably around $ 700.00.

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1 Answer

Side shadows on picture

it sounds as if there are speakers to close to the tv or the built in speakers are not magnetically sheilded properly (maufacturer defect) if u have or have ever had speakers on the left and right side of your tv then the magnets in them will discolor and distort the screen. sometimes even long after the speakers have been moved away from the tv it will still look that way. you may try going to the library( or online )and looking in tv repair books on how to build a homade degauser unless your tv has that feature built into it in the menu somewhere like some computer monitors do. I had placed the front speaker of a 5.1 surround sound system on top my tv and it cuased that same problem, but i found out that by placing a small round magnet with a hole in the center on top of the tv (after removing the speaker for good) right where the discoloration was.. had to flip it one side or the other to get proper immediatly took away most of the discoloration and over time it disappeared. I hope this helps. Please email me at as to your conclusion in case it will help others. thanks, Adam

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1 Answer

I have have this TV for almost 3 have a shaded area on the left side

The dark side of the screen causes of the lamp alignment or prism glass alignment. This is critical you have to consult your LG technician to do this. But if you have any background o repair consult the service manual. Please careful not to touch the prism quarts so that you maintained the clarity of picture and brightness on the screen. 

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2 Answers

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sounds like your main power supplyis going bad . It supose to be 130 dc but I'll bet its down to around 90 to 100 volts!!! its probably the main filter cap or the regulator IC . hard to say without measureing the b+ good luck

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