Failure to follow these instructions could result in damage to your equipment and may void your warranty. If you are adding memory rather than replacing it, skip the section "Removing Memory Cards. " Note: Written and video instructions covering customer-installable parts are available at http://www. apple. com/installparts/. Warning: Sharp edges can exist inside your computer and on any parts being removed or installed. Use caution to avoid injury. Tools Required The only tool required for this procedure is a jeweler's flat-blade screwdriver. Memory (RAM) Your computer comes with two memory slots, one above the other. From the factory, your PowerBook comes with one memory card installed in the lower slot. Note: If desired, you can install additional memory in the upper memory slot or replace a memory card in either slot with one of greater memory capacity, up to a maximum of a 512 megabyte (MB) memory card installed in each slot. Warning: Memory cards come in various specifications. Only install memory cards that are approved for your PowerBook. Opening the Computer 1. Place your computer on a clean, flat surface. Shut down your computer. Disconnect the power cord and any other cables connected to the computer. Warning: Always turn off your computer before opening its case to avoid damaging its internal components. Close the computer and turn it over. Slide the battery compartment latch (Figure 1A) to the right to remove the battery (Figure 1B). Removing the battery will prevent you from accidentally turning on the computer. 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. Turn over the computer and raise the display so you can access the keyboard...