Question about Sharp AQUOS LC-45D40U 45 in. LCD Television

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For about 6 months there has been a faint gray/black verticle line running down the middle of the screen . is worse on blue/green backgrounds, and is almost not noticable on white backgrounds. I know that i have read things about this problem before. any idea?

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I've seen a similar looking problem and it is a bad LCD panel. It will show even on a non-used input, and will show through the menu screen and the screen saver, also. Sharp's LCD panels are very expensive,too. Over 4000 at encompassparts.

Posted on May 03, 2010

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My hitachi 53udx10b was supposedly just serviced but the picture is extremely blue. Have tried adjusting picture to no avail. Help.


I am going to tell you a simple thing to do to know what your problem may be.

With the set on turn the color all the way to zero. Go to a channel if you can that is in black and white. What color is the screen?

If the answer is that it is blue in the background whoever serviced the set did not and could have removed front speaker grill and inspection plate behind it; there is a black plastic block with three screen controls (red,green,blue) and 3 focus controls (do not touch the focus ones.)

I suspect if the blue screen is there a slight adjustment of the blue screen down will correct this.

The picture with the color at zero should be black and white or gray. If blue is background color it will also be with color.

This is called gray scale; picture with color off has to be gray or black and white.

Before you rate this solution if you have questions make a comment right here and I will advise you.

SD TECH

Jun 29, 2011 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

My kp51HW40, flashes blue and sometimes cut itself off, the red led light on the front blinks. It comes back on when you press the power button on the remote.


This model is prone to bad blue and other picture tubes; the tubes will cause the screen to go bright blue (or red or green) and the set detects too much current is being pulled and shuts the down.

The tubes are NO LONGER AVAILABLE and even if they were too expensive--only way to get one now is remove the bad one and send it out for rebuild--about 300 per tube.

THERE IS ANOTHER WAY TO DEAL WITH THIS THAT NEEDS NO PARTS AND TAKES ABOUT 10 TO 15 MINUTES.


IF YOU WANT I WILL EXPLAIN IT TO YOU:


With the set unplugged you need to remove the entire plastic grill on the front of the set under the screen. It is usually held in by either 3 screws on either side on the back or 2 screws on the bottom front covered with a little cap.

It lifts out from the bottom and has tabs at the top that tuck into slots. You will be able to free it but the front controls are mounted into in---you turn it to the left and tilt it out of the way--there are some wires you can release that are held with ties etc.

With it clear remove the inspection plate behind it dead center. Directly behind the plate you will see a square black plastic block with six black plastic shafts.

There are two rows of three---you have to look closely as one row are marked FOCUS(do not touch those) and the other row are marked SCREEN----looking closer you will see b,g,r which are blue, green and red(green is always in the middle).

Once you locate the blue screen control for sure, plug the set on and take it to a unused VIDEO INPUT.

Look at the screen and if you see blue with or without faint curved trace lines turn the blue SCREEN CONTROL DOWN (USUALLY TO THE LEFT) UNTIL the screen shows no blue lines or background.

The only thing you see is (video 1 for example in green).

The idea here is simple, turn the blue screen down a bit so that tube is not pulling so much current.

This costs you no money to do and it may only buy you some time and more life out of the set. Sooner or later the problem may come back and get worse or the Red or Green may do the same thing.

I have done this "adjustment" on many of these sets and many get another year or more after it is done.

If it does not cure the problem, time to think about another set.

Let me know before you attempt it if you have questions and if this information helped you decide what to do, rate this solution as "very helpful" as I do this here for free.

REGARDS, SD TECH

Aug 10, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Color lines out of focus


Best Solution posted on Apr 12, 2008 Asker's Rating 3%20stars_w.png
dc2eb76.jpg MikeNJ1964
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Rating: 89%, 674 votes
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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MikeNJ1964 was exactly right! I have a Sony KP-65WV600 that had horizontal green lines that showed when the picture was darker. I had to remove 3 screws on the right and left side of the tv holding in the speakers...carefully pop out the middle panel from the clips holding it in....remove 4 screws from the cardboard in the middle and remove the cardboard. I then saw the six screws. The adjustment screws were the three below. I turned the middle screw until the lines dissapeared. I tried the left screw and blue lines appeared which I then adjusted away.
THANKS a bunch. SAVED me money!!!

May 15, 2009 | Sony KP-65WV600 65" Rear Projection...

1 Answer

Lines across screen


If the lines are slightly diagonal and in red, blue and green you have a problem in the ABL circuit. if the lines are only one color you may take the front grill cover offf and remove the panel. look fro the black box 2 inches square with 6 little controls on it. 3 are for focue 3 are for screen the middle on of the screen is the green adjustment the other 2 should be labled r and b respectivly. what ever the color of the line turn the control labeled screen and r b or g for that color ever so ligtly counter clock wise.

Mar 30, 2009 | Hitachi 50V500 50 in. HD-Ready LCD...

4 Answers

Vertical lines in my laptop screen


Try connecting an external monitor to the Dell Inspiron 9300 and see if the vertical line is also present on the monitor. If the monitor display is fine, then your laptop’s LCD display panel is defective. If the monitor also displays the vertical line, then your problem is with either the video card or motherboard located inside your laptop.
Not sure if the Compaq Presario has an external monitor plug, but if it does the above procedure can be applied to that one as well.


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Thank You.

Oct 19, 2008 | Dell Inspiron 9300 Notebook

2 Answers

Verticle line down the middle of lcd monitor.


This is a common problem with LCD screens. It is pixel line damage and the screen is permanently damaged and is not repairable. It will probably get worse. The only answer is to replace it

Oct 01, 2008 | Toshiba Satellite P30 P35 Series Notebook

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.

Apr 11, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

51 big screen apex tv, convergence or verticle IC?


If the lines are thin and close together running horizontally, it may be the vertical driver, but that usually takes out the resistor and sometimes the diode in the B+ for the vert. Also you must replace the caps that caused the problem in the first place.

Feb 05, 2008 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Red spot in the middle of the screen


You most likely have a burn in on the surface of one of the picture tubes. What you need to do to confirm this, would be to take off the front screen, and with the set turned on, look directly into each one of the lenses, and see if you see a mark on the green or the blue tube. if this is the case, and I am pretty sure it is, the picture tube will need to be replaced, but this set is not a young thing, as the green faint lines is most likely a bad capacitor in the screen drive circuit. If the picture tube is indeed burned on the surface, most likely be better off buying a new TV set. Good Luck

Jun 25, 2007 | Toshiba 42H83 42" Rear Projection...

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