Blank screen, no signal, X1 box restarts - every day

Our TV signal goes dead (blank, no signal to TV) at least once every day and then the X1 box restarts. Any suggestions what to look at or check first? It's my mother's house and I'm not there enough to catch this when it happens - and she's not capable of physically getting to the X1 box to check it.  This is a new installation so I suppose there's a potential of a bad box, but if there are other things to check I'd like to cover those.