This article provides information on performing memory upgrades on the PowerBook (FireWire).

The computer has two RAM expansion slots that accommodate standard SO (small outline) DIMMs. The lower slot is occupied by a factory-installed SO-DIMM, the upper slot is available for upgrade. The computer supports a maximum of 512MB of memory using two 256MB SO-DIMMs.

You should not need to remove the processor card module unless you are upgrading the memory in the lower slot. If you do remove the processor card module, make sure that it is firmly seated when you reinstall it. Failure to do so can result in a blank screen when you restart the computer.

Note: PowerBook G3 Series computers used PC66 RAM that is not recommended for use with the PowerBook (FireWire); Apple does not provide support for such a configuration. It is recommended that you obtain memory specifically designated for use with the PowerBook (FireWire).

Memory for the PowerBook (FireWire) must be:

• PC100 Compliant
• 3.3-volt
• unbuffered
• low-power
• 64-bit-wide
• 144-pin
• 8-byte
• up to 2.0 inches tall

1. Shut down your computer, remove the battery from the expansion bay, and disconnect the power adapter, modem, and any other cables connected to the computer.

2. Make sure that the keyboard locking screw, located between the F4 and F5 keys, is not in the locked position. Your new PowerBook comes with the keyboard unlocked, so unless you or someone else locked the keyboard, you can skip this step. If it is locked, turn the screw one half turn in either direction so that the screw slot is oriented horizontally.

Warning: The internal components of your PowerBook may be hot. If you have been using your PowerBook, wait 30 minutes after shutting down your computer to let the internal components cool down before continuing.

3. Release the keyboard by pulling down on the keyboard release tabs (located to the left of the F1 and F9 keys) until the top portion of the keyboard pops up.

4. Lift the top portion of the PowerBook keyboard up slightly near the top row of keys and pull it back far enough to displace the small tabs that hold the bottom of the keyboard in place.

5. Flip the keyboard over and lay it on the palm rests and trackpad.

6. Touch a metal surface inside the computer to discharge any static electricity.

7. With a Phillips screwdriver, remove the screws that secure the internal heat shield.

8. Lift up the internal heat shield.

9. Locate the empty RAM expansion slot.

10. Hold the RAM expansion card at a 30-degree angle. Line up the notch in the card with the small tab in the RAM expansion slot. Then push the RAM expansion card into the expansion slot.

Note: You may feel some resistance. If you are having trouble inserting the card, try pushing one side at a time.

11. Gently push the RAM expansion card down until the two snaps on either side of the card lock into place.

12. Insert the internal heat shield.

Important: When replacing the internal heat shield, make sure it does not cover the plastic tabs for the hard disk and optional AirPort Card. The plastic tab for the processor module should be placed under the heat shield.

13. Press down on the bottom portion of the heat shield to secure it and then replace the screws.