Apple PowerBook G3 400 Sound Card Replacement

Pull the keyboard tabs toward you while lifting up on the keyboard until it releases from it's hold.

To lift the keyboard out pull it up and away from you. Then place the keyboard on the track pad.

Pull the keyboard ribbon vertically from the logic board to release connection.

Your computer should look approximately like this.

Remove the two silver Phillips #1 screws that attach the heat shield to the metal framework.

Lift the heat shield up and toward you.

Pull the PRAM battery cable vertically upward to disconnect it.

Remove the battery by pulling up and to the left.

Remove the two T8 Torx screws that attach the heat sink to the processor.

Remove the long silver Phillips #1 screw from the heat sink.

Lift up the heat sink unit from the left side and remove.

Lift the processor on the right side and pull directly up.

The RAM chips should be in the slots on the processor.

After removing the RAM, your laptop should now look like this.

Locate the orange tab, which should be just left of the hard-drive.

You must disconnect this orange tab from the logic board to enable the next step.

It is better to do this by grabbing the plastic connection point, not the relatively flexible cable.

Grab the plastic strip shown here and gently remove, pulling up and left.

Pull left to avoid the hard drive catching the casing.

Once you have removed the hard-drive, your laptop should like this.

Remove the single black Torx screw from the modem.

Remove the black rectangle that is being held on by the one Torx screw.

Using your fingers, lift the modem from the socket it is plugged into.

Disconnect the cable that is attached to the end of the modem to remove the modem.

Your computer will look approximately like this.

Push the display back.

Put your index finger under the power button and gently pull the clutch cover back.

Repeat for the left side.

Lift the clutch cover up and off. Pull it towards yourself.

Disconnect the display cable from the logic board.

Remove the Torx screw that holds the display cable.

Pull out thick display inverter board by pulling it up and out. Two tabs will be holding it in place, you need to get pass these to pull the board free.

Disconnect the white inverter cable. Pull it towards the left.

Disconnect the inverter plug by pulling it up from the logib board.

Turn the laptop around.

Open the port door.

Remove the four Torx screws.

Turn the laptop so the front faces you.

Pull the black Airport antenna up.

Pull the display up as you hold it firmly with both hands.

Your laptop should look something like this.

Disconnect the large orange wire that is shown.

Take out the one short black and three long silver Torx screws from casing.

Slide the black plastic shield away from you and out from under the hard plastic casing.

Disconnect the orange cable from the logic board.

Take out the two long silver Torx screws.

Turn your laptop over.

Take out the five small Torx screws from casing.

Remove the two long Torx screws and make sure these are put back in the right place when reassembling your device.

Turn your laptop back over.

Remove the three small black Torx screws from the frame.

Remove the small Torx screw that holds the logic board to the casing on the left.

Hold the upper casing in the place shown and pull it back to release the lock. When the lock has released, pull up just enough to keep the case from locking again.

The eject button on the left side of the laptop keeps the upper casing from lifting up. To get around this, you must push the button in to the point that the upper casing can pass by the button and continue lifting up.

Lift up the left side of the upper case just enough so that the two audio cables connected to the sound card can be disconnected.

After disconnecting the audio cables remove the upper casing.

Your laptop should look something like this.

Take out the two long silver Torx screws from the power card.

Hold the power card near the black plastic shielding and lift up to remove power card.

Lightly hold the metal shield on the left side of it and slowly pull up and toward the front of the laptop.

Remove the black Torx screw from the metal frame that it is holding it to the bottom casing.

Using a 5mm wrench or needle-nose pliers remove the small nut from the bolt.

Disconnect the fan power cable on the left side of the laptop.

Rotate the laptop 180 degrees so that the back is facing you.

Lift up the left side of the metal frame and remove the one black Torx screw.

Hold the filter by the black end and rotate the filter toward the front of the laptop. Then pull it up and above the frame.

Take out the metal frame.

Your laptop should look something like this.

Lift up on the sound card from both the left and the right sides and remove.