Question about Sharp Aquos LC-37D4U 37 in. LCD Television

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Blue Grey Horizontal lines across Sharp LC37D40U top 3/4 of screen

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  • Sharp Master
  • 8,617 Answers

Could be the Tcon (logic Board) thats usually the cause of lines

Posted on Feb 20, 2012

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: sharp 2002

If you are using an analogue signal then check things like DECT phones, Wifi / DSL modems, power cables, power convertors / UPS, washing machines, dryers, microwaves etc are kept as far away from the cables as possible.
Have you bought anything new recently, when it happens think what things are turned on... is it the garage door being opened etc.
If you are using a digital signal (and ideally something like a DVD player or a games console rather than a cable TV box) then check the HDMI cable.  If all appears well then it could well be a fault with the television, especially if you get interference from multiple source (i.e. cable TV, DVD player, console etc)

Posted on Nov 18, 2007

  • 208 Answers

SOURCE: Blue horizontal and vertical lines

We have many problems with loose or poorly seated cables and connectors on these units. Pull the back and reseat all the internal cables, especially the LVDS cable to the LCD control bd. If this does not correct the problem the main cause is a bad LCD control bd. or possible a defective main bd.

Posted on Feb 03, 2008

  • 103 Answers

SOURCE: Sharp 42" flat screen LCD T.V.

You have a bad buffer ic,which is part of the lcd panel.Definiately call sharp to get it repaired.If it doesn't have a warranty,persistence through sharp will get you results.

Posted on Mar 07, 2008

cheater21
  • 2 Answers

SOURCE: Sharp Aquos 37" picture

Those lines are because of "Interlacing". a REALLY bad case of it. what are you watching when this happens?

Posted on Jan 02, 2009

  • 1 Answer

SOURCE: the horizontal on the screen has moved i have a 2

i have same problem it happens with my hdmi and component port.
did you ever find out what the problem was?

Posted on Feb 16, 2011

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1 Answer

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Sound like your Y-Sustain board has one foot in the grave. The Y upper buffer and Y lower buffer boards go when the Y Sus Goes too...

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Dell inspiron laptop grey dotted line across


You could try removing the display device in device manager then rebooting. At boot up windows will reinstall the drivers.
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Screen has gone grey and has fine horizontal lines on entire screen. Blue screen is out.


Either the screen voltage to picture tube is more than normal, or the video processor IC has damaged. There is an other possibility that there is no voltage at the video output card, plugged on to the neck of the picture tube. Anyway, your set need a through checkup, and the work is somewhat skilled one. Just check this site. Soemtimes you might get some details about this fault. The fault is called vertical retrace lines. Thin horizontal lines all across the screen with an inch apart. One among the posts published in the following site have details about this fault.
Visit the site named 'Electro-help' for more details. Click this link. View it in "Timeslide" or "Flipcard" option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 1250 posts to different brand TVs now. Pull up older posts there.


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1 Answer

Horizontal blue lines with a slight blue wash in the screen


Hi,
Its because of Over Voltage of Screen (G2) to Blue CRT.
Take off front lower cover (speaker grill) and unscrew board. There you will need to find Focus Block mounted having 6 control knobs. 3 knobs are for Focus control and 3 are for Screen volts control. Find Blue Screen control knob and turn is Counter Click Wise slightly until bluish shade disappear on screen including few blue horizontal lines.
If you select AV input to adjust that will be fine as you do not need to wait for dark-scene.

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WHEN YOU HAVE A SOLID BLUE LINE THAT DOES NOT MOVE...YOU HAVE A DEFECTIVE PANEL...LIVE WITH IT OR REPLACE PANEL..NOT COST EFFECTIVE TO REPLACE PANE....JOE ACE

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you just say horizontal lines / and across a top of your television.I expect your trouble is the vertical line of your television . sound ok? try trouble the vertical section the check the resistor?

Apr 19, 2008 | Televison & Video

2 Answers

Blue horizontal and vertical lines


We have many problems with loose or poorly seated cables and connectors on these units. Pull the back and reseat all the internal cables, especially the LVDS cable to the LCD control bd. If this does not correct the problem the main cause is a bad LCD control bd. or possible a defective main bd.

Jan 12, 2008 | Sharp Aquos LC-42D62U 42 in. LCD HDTV

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White horizontal, zig-zagging lines


Sounds like the flyback transformer is bad. couple of 100 dollars if it is that

Dec 03, 2007 | Televison & Video

1 Answer

Green horizontal lines across screen


try adjusting the green screen control. remove the front bottom panel of the tv by removing any screws holding it in place. gently pull of the front panel, there are gromets holding it in place, you will be able to gently remove the front, just make sure you get all those screws. now reove the small wodden or plastioc panel. now you will see the screen/focus assy. check to see of the screen controls are the top 3 or bottom 3. adjusted the center screen it's the green one, the other 2 are the red & blue. it is best to adjust in a dark room where the lines will show up easier. good luck

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