I believe most ibook screens would be, provided the fit size wise (though I could be wrong on that). I have read reports of people successfully swapping out G4 screens with older G3 screens, so I think you're probably fine with whatever you can find (provided it's from a later G3 or a G4 ibook, don't buy a random screen from a PC or something...). I'd check the marketplace forum, there have been a few people parting out ibooks recently...