Lcd horz lines in display - Computers & Internet

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

You have to check the connection from the TCON Board to LCD panel. Sometimes Bad contact can cause such problem.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Sounds like you have a bad video card

The monitor or lcd screen is probably going bad or the video card inside the computer is bad. To isolate the problem try connecting an external monitor to the laptop. Borrow a Monitor from a neighbor, friend, relative or co-worker and connect it to the laptop. If the Borrowed monitor displays ok without the blur and lines, then your lcd screen is bad and the video card inside the computer is good. If the Borrowed monitor displays the same way as your lcd screen with the blur and lines, then your video card inside the computer is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your video card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If you have tried this with an external monitor (and the line is not there)
then the problem is either the connection on your display cable or (more likely) a fault on your LCD panel. If it's still under warranty I would let Dell take care of it.
If you want to do it yourself, you need to get a replacement LCD panel, take the screen apart (the top half of the laptop) and switch out the LCD panel. Some small Phillips head screwdrivers are required, the screw heads on hinges etc. are tiny.
While this is not an overly difficult process, it may prove daunting to some people. Most computer repair shops like mine would charge $30-45 for labor on this plus the part, which according to ebay will run about $75. Make certain you get the correct size, as there was a 14.1" and a 15.5" model (They are not interchangeable). Screen size is measured diagonally across the actual screen and does not include the trim.

The lcd is bad usually the lines start very small and rapidly over time become about an inch or so thick.

if they are pixel wide and vertical your panel has been hit or just fail
if not on warr buy a new set very expensive if they are horz side to side the t-con board has gone bad..either way have it looked at by a pro

Just had the same issue with the horizontal lines. In my case, too, turning off the monitor would make it go away for a while. called Dell, turned out it was still under warranty (3 years), got a replacement monitor the next day. Way to go Dell!

caution reduce brightness to protect crt burn. vertical line with sound ok is due to 1 deflection coil connector loose or wire going to horz.coil disconnected. 2 capacitor going to h/winding loose or defective. 3 print break from eht to h/coil.