davesings,

I'm sorry to hear that you're having this issue.

Unfortunately, I'm not able to diagnose the unit, and I'm not sure what may have happened. If you haven't already, try registering your unit, which in some cases can extend your warranty by three months. You can do that here:

http://www.samsung.com/us/support/account/regist

Then try to call 800-SAMSUNG, noted that you registered, and see if maybe they can assist further.

--HTech