Gday all, i just purchased a new ibook three weeks ago and love it, but wait theres more... Since i got the ibook it has had some real problems!!! The main problem is When im using it sometimes the screen just goes black like i have turned down the contrast completely!! (my preferences are all on never for energy etc..) and i put it to sleep to get it back... Also now im back on my pc cause a couple of times it has just switched off completely, it did that today again and now im left with a new ibook that wont even turn on!! anyone had any of these problems??? Thanks all.