my nokia n900 is very deficult problem.
iam 2 days ago updating file. Then file updatingsuccessfully
then device restart, but not n900 do not open, iam restarting.
But not problem devices

press power button then, LED blueish bright glowly more times
then
NOKIA
installin software update
please do not interrupt

only on 10 second visible display
and again restart device. Again same display
installing...