hello. i received my new ibook. there is a problem with the display. the display would turn black when in use. pressing the power button or moving the trackpad does not work. the display would turn black even with the energy saver set to never. if i close the ibook to sleep and open the ibook the display would be bright again. the display would then turn black again after a few seconds. i know the ibook is not asleep because i can barely see the desktop. if i press the power button and the return button the ibook would shut down. what is the problem with the display? this is my first apple product and i am fustrated with this problem.