I'm sorry to hear that you're having this issue.
In some cases, and service can verify, registering your product online may get you an additional three months of warranty. You can check that out here:
After you register your unit, call 800-SAMSUNG and request a service for your unit.
It appears that my LN32B460B2D TV RF input died after 13 months. When I select the TV input, all I get is static on analog channels (2) and black on digital channels (2-1) and the message "Weak or No Signal". I am using a known good cable signal as input. The tuner is set for "Cable". Other TV sets I have work on the same cable.
The composite and DVI inputs work fine, but anything to do with the tuner does not. Running a channel scan finds no channels, analog or digital.
Is there anything I can do to reset or fix this problem?