Sorry to hear you're having troubles.
You might want to try setting the unit to factory default settings.
This may be in the menu system. But you can try this. Hold down the Enter Button on the remote for about 15 seconds. If you get a menu prompting you to reset to factory defaults, click yes.
Another option is to hold down the menu button on the television to see if you can put it into Shop Mode, and then back into Dynamic mode. It may be that the settings will self-adjust.
Otherwise, maybe you can have a service tech go into the service menu and reset it to factory settings from there. It won't be free, but probably will be cheaper than $1000.00.
Keep me posted!
I think my problem started with a short power interruption to my house while watching tv. The tv is connected to a surge protector, but just the generic hardware store variety. When the power came back on, the image was distorted by a patchwork of wide horizontal and vertical bands and the whole screen had a greenish hue, but the picture was still discernible behind the bands. The menu screens and TV guide screen were fine just the tv image was distorted - same problem with dvd input or cable. Unplugging the TV corrected the problem for awhile. A couple months later, it reappeared and is not corrected by unplugging it. In addition, now when I turn it on I get nothing; the lamp light flashes and the screen gets slightly brighter, but no picture or sound and no start-up beeps. After a few minutes it shuts itself off. I tried re-seating the lamp, but this had no effect.
I contacted a service rep and he thinks the problem is the main board which is a $1000 repair. The tv is 2 years old and not under warranty. Since I have seen a few similar post with the same model, I was wondering if this is a known problem and hopefully has a cheaper repair option. It seems crazy that I would have to throw away a $1800 tv after 2 years.