Have Red X with a 5.

My Uverse was showing a red X this morning.  I did the power off for 2 mins, then powered it back on.  Had the gear.  Left it alone and it was working after work.  Was out all evening. Came home and saw the red and green LEDs blinking and a red X on the TV.  Did the power cycle again.  This time I had the gear for a bit, then a red X with a 5 below it.  Believe it's some kind of hardware failure.