My 3 year old granddaughter was pushing buttons on the remote, and somehow was able to find a sequence that caused the DVD recorder to freeze on the "Welcome" screen. Sony had no answer for this!!! I unplugged it overnight....same result. I contacted Sony (they were no help), and finally just unplugged it again. We went away for a long weekend, and while away, bought a new recorder to replace it (Toshiba this time). When we got back, I plugged in the Sony just for sh#$'s and giggles, and voila, it worked. The only thing I can figure is that there is some sort of capacitor inside that holds the memory until it discharges (which appears to take longer than 24 hours). So far, all is well!!! Therefore, if anyone from Sony reads this, add it to your previously useless troubleshooting page that invariable sends us to your repair link!!!!
So, if this happens to you, unplug the unit for a couple of days before sending it in for repair!!! No guarantee it will work for you, but it did for me, so there is hope!
Dennis, December 2008