Please help. My N9 is starting only USB plugged, the power button shows no function, cant even tell that is is shutting down after 8 seconds hold. After plugged USB the diod lights up steadily for some time before the device is present on the computer( NOKIA logo on the screen of the phone) I becomes available for the flasher for a limited time and then shuts down. I have tried to flash but it times out before the process finishes, timeout 5000 or something like that is the error.

Could somebody tell me how to make the device stay connected for a decent reflash?