A little of this was discussed in an older thread.
The Mini is connected to a Samsung TV with HDMI and uses a network connection. The Mini is on all the time but the TV is powered off when not in use.
When it has not been in use for several hours the TV will come on to a blank screen. Hitting different buttons including Tivo and live TV seems to do nothing. After a few minutes it will start flashing and appears to be going through all the commands that were previously hit on the remote buttons. It will then settle down and be fine. Very odd.