Failure to follow these instructions could damage your equipment and void its warranty. Note: Written and video instructions covering customer-installable parts are available at http://www. apple. com/installparts/. Warning: During this procedure, keep small parts away from chlldren. Tools Required This procedure requires the following tools: · Phillips screwdriver · 2. 5 mm Allen wrench Opening the Computer Warning: Always shut down your computer before opening it to avoid damaging its internal components or causing injury. After you shut down the computer, the internal components can be very hot. Let the computer cool down before continuing. Place your computer on a clean, flat surface. If you think your computer is in sleep, press the power button on the front of the computer to wake it. Shut down your computer and wait five minutes before continuing. If you attached a security cable through the computer's lockable cover latch, remove the cable. Unplug all other cables from the computer except the power cord. Touch the metal PCI access covers on the back of the computer. (Figure 1) Important: To avoid electrostatic discharge, always ground yourself by touching the port access covers before you touch any parts or install any components inside the computer. To avoid static electricity building back up in your body, do not walk around the room until you have completed the installation and closed the computer. 073-0625 Rev. A 7. Unplug the power cord. Lift the latch on the right side access panel. Gently lower the access panel until it lies flat. To avoid scratching the case, lower the panel onto a soft, clean cloth. (Figure 2) Warning: If you see any lights glowing on the main logic board, the computer has not been shut down. Close the side access panel and shut down the computer before proceeding...