After several hours of monitor use, a horizontal distortion sets in of the monitor-image, after several minutes increasing and finally turning into a vertically revolving image. The problem especially appears when looking at video's. When I turn of the computer for an hour or two, and subsequently start using the pc again, the problem seems over. But these last days I experienced that after several hours the problem will rise again. I've downloaded already the driver. Also I've re-installed the software for the graphic card. I have used this monitor for six years. Never had any problem with it.

they dont last forever... time for replacement as most are not user-serviceable..

You have to check the ESR in tha caps in power supply with esr meter.
If you dont have one just replace all capacitors in the power section(there are severals of them)This is the simptom of low esr in the capacitors.
Return the monitor in factory settings.

Wide screen monitor distortionDepending upon the screen resolution that has been set inDisplay, the image will be distorted on these large wide screen monitors.
Create a large circle image using a draw program such as Paint (hold down theShift key as you create the circle as it will draw a perfect circle).
Open Control Panel - Display - Settings tab and adjust the Screen resolutionslider, increase or decrease the screen resolution then bring the circle imageto the front and check the image, if the circle is still distorted then changethe screen resolution and check the circle again until you are satisfied withthe image of the circle. When you are satisfied then click apply.

Hi,
Replace lcd panel to solve tv problem.
Thanks.

To adjust the display settings:

1. Press the flywheel control. The main menu appears.

The current display settings appear across the top of the main menu.

2. Rotate the flywheel to highlight an option. The name of the
highlighted option appears in the center of the menu.

3. Press the flywheel control to select the highlighted option, then
rotate the flywheel to adjust it.

Some options can only be enabled or disabled. There are also some
options that contain additional menus.

4. Repeat Steps 2 and 3 until you have made all your changes.

5. Rotate the flywheel control until Exit is highlighted, then press
it to exit the OSD control system.


OSD OPTIONS:

Contrast increases or decreases display image contrast.

Brightness increases or decreases display image brightness.

Horizontal Size increases or decreases the width of the display image.

Horizontal Position moves display image to the left or right side of
the screen.

Vertical Size increases or decreases the height of the display image.

Vertical Position moves display image to the top or bottom of the
screen,

Pincushion curves the sides of the display image inward or outward.

Trapezoid increases or decreases the trapezoid distortion of the
display image.

Degauss removes magnetic discoloration from the display image.

Recall returns most options to the original factory default settings
if the monitor is currently using a preset video mode. (See the “Video
modes” section in this guide for information about the factory preset
modes.)

Advanced Option opens the Advanced Option menu. Color opens the Color
Manager menu.

Language changes the display language for the OSD control system.

User displays information about the monitor’s preset modes.

OSD Manager moves the OSD control window on the screen.

Exit closes OSD control system.

There are adjustments in the size of the items on a screen under the screen properties, settings. If you right click on the desktop screen and then properties you can get there. There is at least one size which causes a distortion of images being displayed. This may be your problem.

I had same problem.
Narrowed it down to C637 on logic board.
Replace C637 or logic board.

if thats the case on the final output when u see on pc then my friend

ur CCD is getting weak and these lines will increase in the coming days and will turn pink or purple and distorted , there is no cure for that unless u change ur CCD i will recommend a new one

Click here to get more info on the subject and also check the other links in that post.
Good Luck.