subject: How to Determine If the LCD or Inverter Board Is Damaged on a Mac G4 Laptop [print this page] Power downPower down. If the screen does not display any picture at all, shut down the laptop down and connect it to an external monitor using a VGA cable and a DVI/VGA adapter. Then turn the external monitor on and start the laptop up. If a picture is displayed on the external monitor, then the LCD of the PowerBook G4 or iBook G4 is the source of the problem and must be replaced or repaired.
How to Determine If the LCD or Inverter Board Is Damaged on a Mac G4 Laptop
