I have two AM21's - one hooked up to my HR54 and one hooked up to my HR24. The one hooked up to my HR24 seems to have gone bad. The local OTA channels cannot find tuner 1 or 2 in the guide any longer. I tried to reset channels and that cleared all my OTA channels. I tried rebooting in several different manners with no success. I was able to remove the Antenna from my menu and get it back into my menu through a series of reboots. When I choose my local zip 61008, it finds my area, and the "finding guide data" takes awhile but does complete successfully. Then I check to edit channels and there are no channels to be found. I have tied different zip codes with no success. I have verified my antenna is working probably by hooking up directly to my TV and there is an excellent signal and all the channels can be viewed. The HR24 knows its connected to the AM21 but I can't get the channels to be found it seems. Any ideas? Anybody have one available for a decent price? Ebay prices are too high right now. Thanks in advance for any help!