I had to unplugged mine yesterday morning, and again yesterday evening when I got home as it was locked up again.
This morning when I woke, I found that I could see nothing but a grey screen. I could power down the unit, and power the unit back on, but when the unit was on, the screen was entirely grey. When off, it did go off.
unplugged again this morning to fix grey screen... booting now....
after downloading guide data, it went back to the grey screen for about 5 seconds, and then finally showed programming.
Seems to be working now.
This was supposed to been corrected last night after I rebooted it, but had problems again this am.....