Seasonal Service calls
This isn't exactly your answer, but...
For spring, the "default" check on a service call is to check for line of sight due to new leaves on trees. (Of course.)
Summer season's "default" check on a service call is to check the DPP Twin, if there is one.
I noticed a very high failure rate of DPP Twins at first high heat of summer.
Beginnings of failure of the DPP Twin often showed up when viewing lower transponders signal strength. Specifically, transponder 4 on satellite 119 was one of the first to go out. In St. Louis, that meant that if the customers were Cardinals fans or cooking fans, they watched what was coming from 119, transponder 4. Their complaints were the same. A check of low # transponders showed some very depressed or absent. (Some are always absent, though.)
Also, sometimes an LNB reset will fix similar issues.
Granted, this information was specifically derived from DPP Twins, but I don't imagine the "DPPlus" technology was changed for the 1000.2s, rather just re-packaged.
And, with resetting receivers, it's good to check the house wiring, and make sure it's not plugged into a Monster power product.
Highdef Jeff
Some tips and troubleshooting here:
Solid Signal