I'm sorry to hear that you're having trouble with your unit.
Do you have a transaction number from your call to Samsung's customer service? I can't promise any change, but I'd like to have someone review your case.
My LN37B530 is already broken after only 1.5 years.
The screen just went black (althopugh audio is OK).
Samsung support has been of no help since I'm outside the warranty period.
Hope this may warn people not to trust this company.