flickering brightness - DirecTV

#1
Hello all,
I'm experiencing an intermittent screen flicker where it seems like the gamma level of the picture flickers. picture quality is otherwise clear. have narrowed it down to the receiver as i've moved the receiver from room to room and the problem follows. I'm wondering if this is a known issue, are there any fixes and if not, how to get a replacement receiver. is not a television issue as other sources such as ps4, and xbox one plugged into the same hdmi port cause no issue.

Direct Tv h44-500 receiver
connected via hdmi


This question, "flickering brightness," is about DirecTV channels, programming, equipment, and sports.
 

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