Inverter Board for Aluminum PowerBook G4 12 Out of Stock This inverter board will work in any Aluminum PowerBook G4 12". If your machine is "whining", or the screen is too dark, this could be the problem. Return to item list    Currently out of stock.        $1300 $1549 $1574.99   100% free eBay sniper collaborative art learn to read chinese great deals on books by the best authors