Yes, however, the Display is as much as a new set.
It is a recommended practice to repeat the channel search routine periodically as the DTV environment is subject to change. Also, the antenna connection to your TV may not provide sufficient signal strength to maintain picture quality. Even weather can be a factor.
Dead pixels are a fact of life on these newer flat panel TV's I dont believe you can fix them. They will be "on" on a completely black picture.
According to the manual for the TV, you need to change the resolution on the computer itself first.
The computer resolution should be 1024 X 768 at 60Hz or 1360 X 768 at 60Hz.
After the adjustment made on the laptop, then try the resolution change option.
This may help, but at your own peril.