Use a coin to turn the battery locking screw 90 degrees to the right. Lift the battery out of the computer. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2569 Remove the four Phillips screws from the memory door. Slide the memory door away from the memory compartment. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2572 Remove the long black Phillips screw next to the memory card. Remove the small EMI finger beneath the black screw. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2573 Flip down the door on the right side of the battery compartment. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2574 Use a spudger or flathead screwdriver to disconnect the Airport antenna from the card. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2575 Grasp the plastic tab and pull the card out all the way. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2576 On the keyboard, remove the F1, F2, F11, and F12 keys. This is scary - take a deep breath before continuing. Place your index finger under the upper left corner of the key and lift up until you hear a click. Then, transfer your finger to the left edge of the key and lift up to pull the key off. You're freeing the two tabs on the left of the key from the two small holes in the plastic scissors mechanism. When replacing the keys in the keyboard, place the key directly over the slot where it will go and press down until you hear the key click into place. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2577 Use your fingernail or a small flathead screwdriver to peel up the gray stickers covering each of the screws. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2578 Remove the two short Phillips screws. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2579 Lift the keyboard by the 'esc' and 'eject' keys and gently lift up until the keyboard is vertical. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2580 Grasp the keyboard connector ribbon near the connector and disconnect it from the logic board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2581 Remove the three small Phillips screws from within the battery compartment. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2582 Turn the computer 90 degrees clockwise and remove the two Phillips screws from the casing. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2583 Turn the computer 90 degrees clockwise again, and remove only the bottom screw on either side of the hinge. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2584 Turn the computer 90 degrees clockwise just one more time, and remove the two Phillips screws on the exterior wall of the battery compartment. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2585 Turn the computer over and open it up. Remove the following 13 screws: Six 2.5 mm Phillips on either side of the keyboard area. Five 4.5 mm Phillips on the left half of the keyboard area. One 7 mm hex in the upper left corner of the upper case (a T6 Torx driver will do the job nicely). One 15 mm Phillips in the upper middle of the keyboard area. One 16.5 mm hex in the upper right of the upper case (again, a T6 Torx driver will work well). /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2586 Peel up the two pieces of foil tape on the left side of the keyboard area. The connectors at the ends of the cables are attached very firmly to the sockets on the logic board. Pulling directly on the cable will either separate the cable from its connector or the socket from the logic board. Carefully disconnect the microphone and power cables from the logic board. Using your fingernails or a dental pick, carefully pry the connectors from their sockets. Make sure you're pulling only on the connector and not on the socket. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2587 Use the orange plastic loop to disconnect the trackpad cable. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2588 Starting at one of the upper corners near the screen, work around the frame, separating the upper case from the lower case. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2589 Lift the upper case off the computer. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2590 Peel back the yellow tape securing the inverter cable near the fan. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2608 Remove the following eight screws: One 4.5 mm Phillips near the modem. Three 6 mm Phillips near the display. Two large 7.5 mm Phillips with attached springs. Two 13 mm Phillips, one on the lower left side of the heat sink and one between the fan and the optical drive. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2609 Peel up the Bluetooth cable on the right side of the fan. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2610 Lift up the inverter cable with one hand, and carefully thread it around the heat sink. The inverter cable is still attached to the logic board, so be careful not to put too much strain on the cable. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2611 Support the heat sink with both hands, and carefully lift it out of the computer. Be careful not to bend the copper heat pipe connecting the two sections of the heat sink. If you need to mount the heat sink back into the laptop, we have a thermal paste guide that makes replacing the thermal compound easy. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2612 Remove the single Phillips screw securing the hall effect sensor board to the optical drive. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2615 Deroute the cable connecting the hall effect sensor board to the DC-to-DC board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2616 Use a spudger or the tip of your finger to disconnect the hall effect sensor cable from the DC-to-DC board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2617 Use the orange plastic loop to disconnect the hard drive cable from the logic board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2618 Remove the two Phillips screws securing the hard drive bracket to the metal framework. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2619 Lift the hard drive up and out of the computer. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2620 Use a spudger or the tip of your finger to disconnect the sleep light cable from the DC-to-DC board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2621 Remove the following five secrews/standoffs from the DC-to-DC board: One 3 mm Phillips in the lower right corner. Two 3.5 mm Phillips on either side of the battery contacts. One 10 mm Phillips in the upper right corner. One 14 mm long 4 mm standoff in the upper left corner. You can remove this standoff either with a 4 mm nut driver or needlenose pliers. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2622 Remove the silver EMI fingers located near the battery contacts. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2623 Use a spudger to pry up the end of the DC-to-DC board closest to the display and remove the board from the computer. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2624 Remove the three Phillips screws securing the modem and modem shield to the logic board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2625 Disconnect the modem from the logic board by lifting the bottom edge of the modem. Don't remove the modem entirely just yet as it is still connected to the RJ-11 board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2626 Turn the modem over and disconnect the RJ-11 cable. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2627 The connectors at the ends of the cables are often attached very firmly to the sockets on the logic board. Pulling directly on the cable will either separate the cable from its connector or the socket from the logic board. Carefully disconnect six indicated connectors from the logic board. To disconnect the four white connectors, use your fingernails or a dental pick to carefully pry the connectors from their sockets. Make sure you're pulling only on the connector and not on the socket. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2628 Lift up microphone cable from the lower left corner of the fan, and disconnect the two sections of the cable. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2629 Deroute the microphone cable from its channel in the metal framework. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2630 Remove the following nine screws: Four 3 mm Phillips allong the left edge and near the fan. One 4 mm Phillips in the bottom left corner. Two 6 mm Phillips near the left hinge. One 9 mm Phillips in the top left corner of the fan. One 12 mm Phillips just above where the hard drive was located. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2631 Peel up the yellow tape securing the display data cable to the metal framework, and deroute the display data cable from its slot in the framework. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2632 Remove the newly revealed Phillips screw near the RJ-11 board. Some computers may have two Phillips screws securing the RJ-11 board to the metal framework. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2633 Lift the RJ-11 board up from the left side, and remove the single Phillips screw hidden beneath. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2634 Lift up and remove the silver EMI fingers located above the ports on the left side of the computer. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2635 Pull back on the orange optical drive cable with one hand, and use your other hand to lift the front section of the metal framework over the optical drive cable. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2636 Deroute the microphone cable from its channel in the upper right corner of the framework. The metal framework should now be free can be removed from the computer. Be careful when removing the metal framework that none of the cables get caught on the framework. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2637 Remove the two Phillips screws from the bottom right of the logic board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2638 Do not lift the logic board out completely without first disconnecting the DC-In connector underneath the logic board. Lift the logic board partly up from the optical side. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2639 Disconnect the DC-In connector from the underside of the logic board. /Guide/Repair/PowerBook-G4-Aluminum-12-Inch-1-1-5-GHz-Logic-Board/553/all#s2640