For some reason I am no longer getting sd channels on tuner number one on my VIP 622. I can get them on tuner number 2 and I have a VIP 722 and both tuners work correctly. I guess I should mention that the programming guide is on All channels or all sub and all of the sd channels are missing. I am still seeing my local off air antenna channels. I have unplugged the receiver and have held the power button a few times and it is still not getting SD channels. Does anyone have any advice on how to fix this?