This morning I plugged my n800 into my pc so that I could copy some files to my 8gb card. I turned it on after it was plugged in and xp said an n800 was connected in update mode and no removable disks showed up. I figured I had to plug it in while my IT was turned on so I unplugged it from usb and tried to turn it on. all I get is is the Nokia screen and then it goes black. Someone please help. Do I just need to reflash it?