My n800 has had this happen twice, I will leave it for a while, and when I come back it has vertical blue lines going through any whitish areas. I was wondering if anyone else has had this. It has corrected itself after shutting down and turning back on though
Go to the support page at nokia.com. There are phone numbers on there. You need to call them. Depending on the area they will give you an address to ship it to.