Best Answer Kevin L , 15 June 2013 - 08:56 AM
OK, it's fixed. Turns out it was the LNB. I ordered a new SL5 from Solid Signal. Unplugged the three receivers, swapped the LNB, restarted and tested the receivers one at a time, starting with the HR44, and all receivers are seeing all sats with very strong signals in the 90s to 100 (except for some spotbeams, of course). I then unplugged the HR44, attached a 4-bay RAID-5 tower with four 2TB drives, yielding 6TB of storage. This will give me the same storage I had with my three HR20s since they each had 2TB drives. One HR20 is retired, and the other two will be retired when I watch all the shows on them.
Thanks for all the suggestions. If the two HR20s weren't receiving 103ca and cb, I would have suspected the LNB or cable right away. But since the cabling was all good and the HR20s worked, the suspect was the HR44. I guess the HR44 is more sensitive to low signals than the HR20s.
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