Hi, Davie;

I had same problem as you had. but right now It works fine. Please don't turn power off by the power key on the top. you have to hold it just for second and when the manual appears, you can select "switch off" and turn N800 off....

after few seconds or minutes...you can turn it on without any problem...

in the beginning, I was thinking return it to buy.com. but everything is ok now and I also get OS 2008 updated to my new N800.

Hopefully, it works for you too.

chjbbrk