Factory Reset EVERY night!?!

Have no fear, it get's better.  I will be in to the store again today, for the third time in less than a week.  Now the box will not boot up.  Box went out while we were watching it last evening and hasn't come back since.  Tried to "reboot" a couple times last night to no avail.  Got tired, went to bed.  Woke this morning and tried again before I left for work.  When you "reboot" the "welcome" screen comes up and makes you wait a while.  The digits on the front of the box show a bright "B" and a dim "oot". Finally the box just got tired and quit sending a signal to the TV.  I have to say, I am beyond mad.  It is almost to the point of comical now  As far as anyone thinking I am crazy about what's been happening....every night we have recorded shows to watch later and every morning they are erased.  I am not sure how else to put it but the box has been resetting itself each night since this began.  What makes it sad is technical assistance (really just an operator reading prompts from a list) has repeatedly told me that my HDMI cable is bad.  That's the best they could muster.  By this afternoon we will have been without cable for more than 8 continuous hours  for 7 days and this will be the 4th box.  I am only asking to receive the service we pay for.