make sure your main receiver is plugged up and running and check the cables on the one giving you the problem. If nothing improves i suggest you calling DirecTv cause troubleshooting this receiver can get very technical.
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I can Help; I've been trained by DirecTV. I have worked as a Technical Support Supervisor for DirecTV for over 5 years
First Unplug the power from your main Genie server for about 1 full minute then plug it back in. the Genie client should be up and running once the server has rebooted - although you might need to unplug the genie for about 30 seconds
I know the directv system up and down. I can give you an answer to anything. I've been a technician for directv for over 4 years. Certified in every field.
if you have reset the genie and the mini genie and this is still happening you have bad cabling or a bad conection this s very likely with the genie system because it is very sensitive to disruptions causes by cabling You will probably need to call and get a service call