Hi i have a similar issue n900 wont boot, turn device on it brings up the nokia screen it dimms down then shuts down, when charger or usb cable is hooked up it will bring the nokia screen up then shut off until the cable is removed, it all started with a camera issue after i installed power kernel so i downloaded rootsh and folled the uninstall procedure from the forum then when i did the phone restart as instructed i got stuck with a non working n900 please help thanks all