I have a ASTRO Saber I UHF (H04RDC9PW5AN) and I am unable to get it to receive anything. It reads and programs fine, but it just won't do anything. I turn it on and get a "beep", but that's about it. Also, none of the sidekeys seem to do anything. Since the PTT is deactivated for RX-only operation, it should give some sort of tone when pushed, but I get nothing. I tried programming in an FRS channel and testing it by keying up an FRS radio I have, but nothing. It programs fine, but just won't do anything. Is something dead in it?