For the past month or two we have not had OTA HD on the 622. We have 2 622s, and the other has not had any problems with HD OTA. I thought it might be the antenna, so I hooked up the other 622s antenna to try with the messed up one. It didnt work either. I tried deleting all the OTA channels that used to work and searching for them again, but it can't find any. does anyone know what might be the problem?