HELP ME PLZZZZ

Today my N900 falled down and the back cover & the battery are unplugged ,when i tried to reboot it , it doesnt work , just showing the white screen and turns off ...& it keeps restarting this way .
i refalshed it wth the new firmware image ,at 1st i was very happy bcoz the N900 booted again & everything was looking good but there was a HUGE problem : the 455.5 MB is the Total size of device Memory.
when i connect the USB cable there is no action at all .
the file manager is empty ,no N900 device memory !!!!!!!
i cant open the "get started" trailer it said(operation temporarily disabled due to low memory)
the camera too ( not enough memory to open camera)
!!!!!!!!!!!!! HELP ME PLZZZZZZ !!!!!!!!!!
I reflashed it twice and no difference .