Tablo Quad here.
Everything was working fine last night. Watched the news, etc. Then this morning I get the weak signal message on all channels. I rebooted the Tablo and router several times and nothing changes. I try the rescan and it immediately tells me “no channels were found in your area”. I check all the connections between the antenna and Tablo and all seem fine. In fact I disconnected the cable into the Tablo and connected my small portable tv and it receives all channels fine. Reconnect the Tablo and still dead.