Hi, Is this the original power adapter? The reason I ask is the first PB DVI used a 45W adapter and the 867/1GHZ used a 65W adapter. If you purchased a replacement you might have been given the smaller unit. As I recall the 45 will run the faster drive but not properly charge the battery. If this is not the case and you can find one to borrow try using a different battery to see if it charges. If it does you need to replace your battery. If not try a different power adapter. Try to borrow these items so you don't buy parts you don't need. You probably will be able to find another adapter easier than another battery. Good luck Ralph