I am at a friends bar who has 11 H21s and 1 HR2x. None of the H21s get HD channels and show 771. However the HR2x shows HD channels. None or the H21s have a signal on 99 or 103 but the HR does. Any ideas? I'm thinking LMB or multi switch. The problem moves with the cable on the HR. using a slimline with 3 LMB (4 cables) and 6x16 zinwell with bbcs.