I'm sorry to hear that you're having this issue.
If it happens with the batteries removed, it's obviously not the remote. I might check to see if there are any other devices located near the bezel button options, such as speakers directly in front of them.
If that doesn't help, I might recommend contacting either your retailer for an exchange, and of course, the unit is under warranty if you'd like to have a Samsung technician work on your set.
I am sorry for the inconvenience, and encourage you to look at the options that best meet your needs.
Hi Tech Team,
I have recently bought a new 40" LCD TV from Samsung, at first it used to be working great, but after 4 days it started switching between source input alone, HDMI to AV and vice versa, even I removed the remote control batteries but the problem persisted.
The device is merely 10 days old, Please any idea or help on the issue,