Mini Genie: Blue Screen Between Channels - DirecTV

#1
I just had my Direct Tv installed a week ago. Ever since the install of the main hddvr and 3 mini genies I am having issues with 2 of 3 mini genies. When we go from one channel to another there is a delay, blue screen shows up, then it will flicker, you hear voices, then after 3-5 seconds the picture will come in. Now mind you I have had the technician come back out and he has no clue what the problem is, as everything has been inspected and is good. Help please what can I do or what is the problem.
 
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