Today I turn on my plasma and I can clearly see what looks like a refresh line traveling up the screen ... I did not change any settings or do anything different than usual.. any hints/tips/suggestions would be appreciated!
The TV was bought in December of 2006 and I didn't get the extended warranty from sears.
Could be a grounding problem. Make sure all your power cords are plugged in tightly. Try a different outlet/circuit if possible. Try disconnecting other devices connected to the same circuit, to see if the problem goes away. Power cycling your television wouldn't hurt either.