Hello everyone,
>
> I have been searching the web for suggestions, and even searched some
> sites for a service manual. I so far have not been able to find
> anything. I am hoping for some advice on what parts could be causing
> my televisions problem.
>
> The image when displaying an HD picture looks like it is being
> displayed from a video card with lower colours. The image looks
> better on regular mode shows, if the picture is displayed with the
> border bars at the sides of the image.
>
> I narrowed the symptoms down with Passmarks Monitor Test program. All
> but three of the test screens appear normal.
> - Black to Red gradient has a large number of darker veritcal lines.
> - Black to White Gradient has red lines intermixed in the gradient.
> - Finally the Red Gamma, most of the gamma bars don't show a solid
> colour but look pixalated.
>
> All the other display patterns do not seem out of place.
>
> Any ideas on what is causing this? I would appreciate any help.
>
> Keith
At first I was waiting for some helpfull suggestions, but none were posted. I then started to blindly test everything my multimeter could test.
The problem ended up being a bad wire in the bundle of wires connecting the HD input board to the screen circuit board located closer to the LCD. Replaced the broken wire, and the picture looks great again.
The good news is that I didn't spend money on parts. I am glad I didn't give up and send it to a repair shop.
Keith