PowerBook G4 Aluminum 17" 1.67 GHz (High-Res) Logic Board Replacement

Schritt 1

Use your thumbs to push the two battery retaining tabs away from the battery.
The battery should pop up enough to rotate it toward yourself and lift it out of the lower case.

Schritt 2

Remove the three 2.3 mm Phillips screws securing the memory cover to the lower case.

Schritt 3

Lift the memory cover slightly and pull it toward yourself to remove it from the lower case.

Schritt 4

Remove the following ten screws:
Two 14.7 mm shouldered Phillips.
Three 12.3 mm Phillips.
One 3.8 mm T8 Torx.
One 6.8 mm T8 Torx.
Three 1.3 mm Phillips.

Schritt 5

The ZIF cable is located underneath the bottom RAM slot. If your PowerBook has both RAM slots occupied, make sure to remove the RAM chip.
Use your fingernails to separate the ZIF cable lock away from its socket. (Move the two brown bits down 1mm)
The ZIF cable lock will move about a millimeter away from the socket before it stops (see picture 2). Do not try to remove the ZIF cable lock.

The ZIF cable locks are the little grey pieces seen on the cable-side ends of the white bar. They will slide, as per detailed picture, toward the cable.

web -

Where could I get a whole replacement for this connector ? Mine came off the motherboard

Ruben De La Cruz - 24/10/20

Schritt 6

Use the tip of a spudger to slide the trackpad ribbon cable out of its socket.

Schritt 7

Remove the four 3.4 mm Phillips screws from the PC card side of the PowerBook.
When replacing these screws, you must reinstall each screw in the correct order. Begin by installing the screw closest to the display hinge, and go out from there.

Schritt 8

Remove the four 3.4 mm Phillips screws from the DVI connector side of the PowerBook.
When replacing these screws, you must reinstall each screw in the correct order. Begin by installing the screw closest to the display hinge, and go out from there.
During reassembly, make sure to reinstall the two screws on the right into their appropriate locations, and not the DVI port anchor holes.

Schritt 9

Depress the display latch release button and open your display.

Schritt 10

Starting near the display, lift the upper case straight up off the lower case, minding any cables that may get caught.

Sometimes the "tags"/"lugs" that are around the edge of the top & bottom frame, be careful not to bend them as when putting back the covers they will not merge. I used a screwdriver to poke through the hole the screw was supposed go in & push against the "inside nut" to let the tag from the top slide down between the 2 tags. The "inside nut" is like the one right next to the ribbon cable as shown in Dia.14. The screws are from Dia. 7&8.

harry allcock -

in what direction does one move the ZIF cable lock? what/where is its socket?

Ian -

When putting the machine back together (following steps in reverse), make sure the trackpad ribbon cable comes through the underside of the computer — there is an opening that the cable needs to go through and you will want to “thread the needle” with the cable before securing the upper case again.

Tim - 23/02/18

At the end of these instructions, Jimbo Combo also mentions this, but it should be repeated.

Because the trackpad/keyboard cable is part of the top face/keyboard/trackpad assembly, it’s actually a PITA when doing reassembly.

One way to make this step simple is to do the following:

1. straighten the Zif cable removing all of the bends that is probably has in it.

2. Start putting the top face/keyboard/trackpad assembly on, starting with the edge AWAY from the display.

3. Place the laptop on it’s side, and thread the cable through the opening, using tweezers if necessary so that it fully goes through the opening in the case.

4. Place the laptop back to the way it was and proceed.

ECJohansen - 06/05/21

Schritt 11

Disconnect the RJ-11 cable from the modem.

Schritt 12

If necessary, remove the strip of tape covering the speaker cables.

Schritt 13

Use your fingernails or the tip of a spudger to separate the ZIF cable lock from its socket.
The ZIF cable lock will move about 1 mm and stop. Do not attempt to completely remove the ZIF cable lock.

Schritt 14

Pull the DC-in ribbon cable straight away from its socket.

Schritt 15

Peel the DC-in cable off the adhesive securing it to the lower case.

Schritt 16

If necessary, use the tip of a spudger to remove the small piece of foam tape from the side of the left speaker.
De-route the AirPort antenna cables from the channel in the left speaker.

Schritt 17

Remove the single 6.9 mm T8 Torx screw securing the left speaker to the lower case.

Schritt 18

Lift the left speaker from its rear edge and maneuver it out of the lower case, minding the cables sitting in the channel near the front edge of the left speaker.

Schritt 19

Remove the single 6.9 mm T8 Torx screw securing the speaker cable ground loop to the lower case.

Schritt 20

Peel back the piece of foil tape covering the modem cable to free the speaker cable held underneath.

Schritt 21

Pull the speaker cable straight up to disconnect it from the sound card.

Schritt 22

In the next few steps, you will disconnect several ribbon cables that cover the right speaker cable.
Use the flat end of a spudger to pry the hard drive ribbon cable connector up off the logic board.

Schritt 23

Use the flat end of a spudger to pry the sound card cable connector up off the logic board.

Schritt 24

Use the flat end of a spudger to pry the optical drive cable connector up off the logic board.

Schritt 25

Use your fingernails or the tip of a spudger to separate the ZIF cable lock from its socket.
The ZIF cable lock will move about 1 mm and stop. Do not attempt to completely remove the ZIF cable lock.

Schritt 26

Pull the PRAM battery & USB board cable out of its socket.

Schritt 27

Use a spudger to de-route the display data cable from the channel in the right speaker.

Schritt 28

Use the tip of a spudger to pry the power button LED window off the right speaker.
Try to place the window curved-side down on your work surface to keep the adhesive around its perimeter clean.

Schritt 29

Remove the single T8 6.9 mm Torx screw securing the right speaker to the lower case.

Schritt 30

Lift the right speaker out of the lower case.

Schritt 31

De-route the speaker cable from the clips along the front edge of the logic board.
The clips open in different directions, so be careful to not break any off during removal.

Schritt 32

Close your PowerBook, minding any cables that may interfere, and flip it over.
Disconnect the power cable connector by pulling it straight away from its socket on the logic board.

Schritt 33

Disconnect the battery cable connector straight away from its socket on the logic board.

Schritt 34

Use the flat end of a spudger to pry the AirPort/Bluetooth cable connector up off the logic board.

Schritt 35

Turn the PowerBook back over.
Use the flat end of a spudger to pry the modem cable connector up off the logic board.

Schritt 36

Use the flat end of a spudger to pry the PC card cage cable connector up off the logic board.

Schritt 37

Disconnect both of the following connectors from the logic board:
Left fan cable.
Inverter cable.
Be sure to pull only parallel to the face of the logic board, as pulling up on the socket will break it off the logic board.
When pulling these connectors away from their sockets, it is helpful to use your fingernails to pull on the ears at each side of the connector.

Schritt 38

Remove the following four screws securing the optical drive to the lower case:
Three 6.8 mm T8 Torx.
One 3.8 mm T8 Torx.
Lift the optical drive out of the lower case, minding any cables that may get caught.

Schritt 39

If necessary, remove the piece of tape securing the display data cable to the logic board.

Schritt 40

Pull the display data cable away from its socket to disconnect it from the logic board.
Be sure to pull only parallel to the face of the logic board, as pulling up on the socket will break it off the logic board.

Schritt 41

Disconnect the right fan by pulling its connector away from the socket on the logic board.
When pulling this connector away from its socket, it is helpful to use your fingernails to pull on the ears at each side of the connector.
Be sure to pull only parallel to the face of the logic board, as pulling up on the socket will break it off the logic board.

Schritt 42

Remove the following 12 screws:
Three black 5.7 mm T8 Torx.
Three 7 mm T8 Torx with spring washers.
Three 6.8 mm T8 Torx.
Three 3.8 mm T8 Torx.

Schritt 43

If necessary, use a spudger to pry up the left edge of the logic board to separate the solidified thermal paste from the heat sink.
If any resistance is felt when prying up on the logic board, we recommend softening the thermal paste by heating the board with a hair dryer before prying further.

Schritt 44

Lift the logic board from its left edge and rotate it toward the right side of the lower case.
The logic board on this model has a tendency to get caught on the lower case near the DVI port at the upper right corner. If it catches as you are rotating it, stop to avoid bending and breaking the logic board.
Rotate the logic board until it is nearly vertical, and wiggle it around until it releases from the lower case.
When reinstalling your logic board, be sure to apply thermal paste to the CPU. Our thermal paste guide makes it easy.
Only replace the gray thermal paste on the CPU. The white thermal material on the GPU chips can be reused.

PowerBook G4 Aluminum 17" 1.67 GHz (High-Res) Logic Board Replacement

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