It may be that you have some interference on the physical panel of your television. If your issues are limited to volume and channel changing, it may be that the physical panel buttons are activating.
You might call 800-SAMSUNG and have a service tech take a visit before your warranty expries.
Keep me posted!
Bought my TV in JAN 08, was working fine until 2 days ago, when i turn it on it starts changing channels by itself,as if it was a doing a channel search and doesn't stop, also the volume goes down all the way to zero. It's almost as if someone was playing with the remote. I'm clueless and i was wondering if anyone had had the same problem or might know what was causing it?...