I took a screwdriver and opened my N900.
Blew away some dust and loosened the motherboard.
Rinsed it under "eletrocleaner", and bent on it carefully as it was slightly curved
Now it's working fine. I have had this problem 3 times now. The two other times i had to send it to Nokia care. They fixed it for me but now its out of warranty so i hope this will work til i get my White N9 64GB