Originally Posted by PeterT
At this point all I can do is to turn the unit off; this requires a LONG hold over of the power switch. I can't remember if the screen changes at this point to the power off or not. Finally, a power back on and the device is back working again.
Normally the screen DOESN'T change in this case, but with the Glo normally the light will go off. I was doing some stupid sync/cancel sync stuff that caused mine to lock this way and pin reset was the only cure (light stayed on until that).