Logic Board for PowerBook G4 400 Out of Stock This logic board can be used to replace one found in a PowerBook Titanium G4 400 MHz. Works with the Titanium PowerBook G4 Mercury(400/500 Mhz) only. 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