iBook 1.07 ghz running 10.3.4. The screen stays black when coming back from sleep. The hard drive is being accessed, you can hear it, but the screen doesn't light up. I have to power down by holding the start button and then restart. Is anyone familiar with this problem and know a fix? It's something that happened every once in a great while and now it is happening consistantly after every prolonged sleep. If I put it to sleep for a few minutes it will power back as normal. But for longer periods of time it will not. I was thinking of reinstalling the OS but I need to get a back up hard drive to store all my music first, 5 gb worth. Everything else important is already being backed up to CD's frequently in fear of this thing dying completely. Also, I have changed the energy savings from various custom settings to automatic and nothing helps.