I have a 211 that has the same problem and error codes. I gave up and run component cables. Dish receivers are prone to HDMI issues and the only way they try to fix is with replacements not addressing the problem. Lame.
When Dish installed my 1000 they have 129 and 110 wired to the DPP Twin. The receiver sees 129 as Sat1, 100 as Sat2 and 119 as Sat3. I'm about to wire in a DPP 44, so should I change things at the Dish LNB while I'm at it? Thanks.