I just had my 622 installed last night. For some reason my Sat HD locals will only work on one of my tuners. I just get a pixelated gray screen on tuner 2. I can use PIP with both tuners on the same Local HD channel (Sat) and one works, one doesn't. Both tuners work fine for SD locals, OTA HD locals, and Sat HD channels. Can anybody shed some light? Thanks 