Hi! sorry beeen searching for an answer but can't seem to find it. Ibook G4 shut down completely after pulling plug out of outlet. Tried to restart by holding down power button and nothing happens- no sounds, no chime, no light. Removed battery and shows all 4 lights light up. Power cord shows green light when plugged into outlet. Changed outlets etc. Several weeks ago had to get a new cord cause old cord would not keep computer charged even when plugged in. No problems after replacing cord until now. I can not get it to restart. Any help /suggestions would be greatly appreciated for a little girl who relies on her computer to play games and be independent the only way she can. THANKS!