screen suddenly shows "no connection", all 3 other sets are fine. Reboot 4 times, no luck.:Try 2different HDMI cables, no luck.: check source, O.K.: try coax cable connection, it works but poor picture: Take box from different set and connect with HDMI, works good: must be bad DVR: get new DVR and same problem: try new DVR with HDMI connection on different set in different room, no connection: try it with coax cabling, picture but poor quality. I am at my "ropes end" and have no idea what to do. HELP !!!!
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