Every 3-4 times I power off and power back on the unit, the unit becomes unresponsive. Sometimes the display is frozen on a single image, and sometimes I don't get any picture at all. One time, I could hear the sound of a stream I had running prior to turning the system off playing in the background, but the image on the screen was frozen. The power light on the unit will go on and off if I try to use the remote to power on/off the unit, but whatever image is on the screen remains.
The only way I've been able to recover from this scenario is by doing a hard reboot (unplugging the power and plugging it back in).