8 | Before You Begin CAUTION: Only a certified service techni cian is authorized to remove the computer cover and access any of the components inside the computer. See the safety instructions for co mplete information about safety precautions, working inside your computer, and protecting against electrostatic discharge. CAUTION: Before touching anything insi de your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodicall...