just wanted to thank you guys ( tvropro,ikki and others)for all the good info in this section.
just got my new 920 up and going.
had to sell the free 922 i got last year($240). for other good stuff like the 7.5 star trak for this project and other sat junky stuff.
took a gamble when i got this 920 off ebay for $40 total price. and very happy now.
it needed a master reset to map in W-5. now getting the sports pack from programcenter SRL versus back. very nice people there and here.
thanks

My advice for you is first check and change the battery if needed and second get a Backup-UPS for it. You won't regard having one for it.

I second changing the battery ASAP (don't wait) Also a UPS is a great investment I have one on mine.