I just had a Genie system installed 5 days ago. Since then it continually goes out. I get a 775 message. DTV came out and said it was because my Genie was on top of main receiver. After he left it happened again. Since then it goes out every night around 10:30. I've had to wait 2 days for DTV to come out again. I want my old system back. This is totally unacceptable.
Is the Genie setting atop another electronic device? That may cause overheating so best to find a different spot. Not sure that would cause your problem though. When 775 is time sensitive, it's sometimes caused by some connection heating.