CAUTION: Before you perform the following procedures, follow the safety instructions in the Product
Information Guide.
NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by
periodically touching an unpainted metal surface (such as the back panel) on the computer.
NOTICE: To avoid damaging the system board, you must remove the main battery (see Before Working
Inside Your Computer) before you begin working inside the computer.
NOTE: If you ordered an internal card with Bluetooth wireless technology with your computer, the card is already installed.