I replaced the battery with correct one... http://eshop.macsales.com/item/Newer...gy/BAA36VPRAM/ ...The G4 will not turn on? ...I then put the prior/old battery back in to check and it does fire up though with the whole 1969 date set back thing. ?? Getting an 08 MP very soon but wanted to do this replacement thing for now. Appreciate any insights.