I am not sure what I did, but I recently restarted my n900 and it got stuck in a boot loop. It will vibrate, show the NOKIA sign, go blank and then repeat the cycle. To correct the problem, I tried flashing the firmware but can't seem to get past the "Program Files\maemo\flasher 3.5" command prompt. Maybe someone can help me get past this point? I really need to get my n900 up and running again. Here is a picture of how far I go with flashing the machine: