When my system was installed one of m,y original receivers was an R15 dvr. I would ocasionaly get a searching for signal on 2 message, I called and they said I must have had a bad wire from the splitter so i swapped it and it was now searching on 1. I replaced that wire and it worked for a while then I would get searching for signal on 1 over and over and to resolve this I would unplug 2 and reconnect it and it would work for a few hours. I thought I must have had a bad dvr so I just got the HR21, new black HD DVR, and I have the same problem. Ideas?
If you swapped the outputs and it it moved with the output, it's not the rec itself.
You said you replaced the wire, provided the connectors are good on the new wire (probably are fine), I would look into these areas....
The wire you replaced, is it going to a ground block or directly to the dish ?
If going to the ground block, also check the other side going to the LNB.
If it goes directly to the LNB, it's probably your LNB, provided your dish is correctly pointed. (My bet is the LNB is bad.)
You
are using the 5 LNB set up correct ?
btw,

to the site
Jimbo