If the panel displays horizontal lines, in most case is a defective LCD panel, sometimes a defective main board will cause this symptoms too.
You may try a new main board first.
SOURCE: Thin Horizontal Line on TV screen
Unit has lost verical deflection. Most likely and IC has failed and will need a tech to diagnose and repair.
SOURCE: Screen not displaying whole letters because of horizontal and vertical lines
I've had the same problem. A temporary fix that I have found is to turn up the contrast all the way (press [2nd] then hold down the up arrow) until the screen becomes mostly black. Then turn the contrast back down (press [2nd] then hold down the down arrow) until it is at a normal level. If you can get rid of all the white lines when you turn up the contrast the screen will be back to normal. Unfortunately this does not permanently fix the problem because I cannot get rid of all the lines and it seems to be getting progressively worse each time it start up the calculator.
SOURCE: Samsung HLS 5679W LED DLP TV Horizontal white lines jagged across screen.
What you are sseing is a convergence problem within the light engine of the set. This is not repairable in teh field other than replacing the light engine part. Since this unit is less than one year old, it should be covered under warranty. From the looks of it, one of the LCD panels has shifted internally. Call for warranty service and indicate that the light engine has a problem. With luck, the service company will show up with the part in hand. Replacement should not take more than an hour or so.
Dan
SOURCE: Samsung HPR4252 with red horizontal lines accross the screen
I just had my HP-R4252 repaired on 12.05.09 with a similar problem. The picture is covered in horizonal, broken lines and the color is predominately red. They lines are grouped together in large bands across the screen.
The tech replaced the Y-Buffer boards (Up) and (Low) in about 20 minutes.
Samsung BN96-02034A BOARD, Y BUFFER UPPER ASSY
Samsung BN96-02216A BOARD, Y LOWER BUFFER ASSY
SOURCE: White dotted lines across newly purchased Sansung 6300.
that is a connector error needs to be reseated but if it is new return it for an exchange
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