Locate the battery release tab on the underside of the G4. Slide the battery release tab to the left and lift the battery out of the computer. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s3310 Locate the battery release tab on the underside of the G4. Slide the battery release tab to the left and lift the battery out of the computer. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s3310 Remove the seven T8 Torx screws from the lower case. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s243 Using your thumbs, slide the lower case away from you. The lower case may stick in the front on a tab just above the center of the optical drive. Be careful as you work the case off, or you may break the thin strip of plastic just above the drive. Lift the lower case off. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s244 Your laptop should look approximately like this. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s245 Disconnect the hard drive ribbon from the logic board using a spudger or the tip of your finger. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s247 To free the hard drive, remove the two T8 Torx screws from the right wall of the battery housing. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s248 Remove the hard drive by lifting the left edge up and out of the computer. There are four rubber bumpers that fit over the hard drive screws. Ensure that these bumpers come out when you remove the hard drive. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s249 Your laptop should look approximately like this. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s250 Remove the two black plastic bumpers and two T8 Torx screws from the side of the hard drive. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s251 Grasp the orange ribbon cable and disconnect it from the hard drive. If the connector is tight, gently rock it from side to side. Be sure to pull evenly on both sides as uneven force may damage the hard drive pins and render your data inaccessible. If you are installing a new hard drive, we have an OS X install guide to get you up and running. /Guide/PowerBook-G4-Titanium-DVI-Hard-Drive-Replacement/90/all#s252