HP Pavilion t300 HP Pavilion Desktop PCs - (English) Users Guide 5990-6416 - Page 130

opening the computer WARNING: The PC is heavy; be sure to use ergonomically correct lifting procedures when moving the computer. WARNING: Electrostatic discharge (ESD) can damage disk drives, add-in cards, and other components. If an ESD station is not available, wear a wrist strap attached to a metal part of the computer. Place cards on a conductive foam pad or inside the conductive wrapper they came in; do not place the cards on top of the wrapper. WARNING: Do not operate the system with the cover removed. Always replace the cover before turning on the system. before you begin Read the following items before attempting to upgrade or service the computer: • These procedures assume familiarity with the general terminology associated with personal computers and with the safety practices and regulatory compliance required for using and modifying electronic equipment. • Set up an equipment log to record the system model and serial numbers, all installed options, and other information about the system. If you need this information, it will be easier to consult the log than to open up and examine the system. • HP recommends that you use an antistatic wrist strap and a conductive foam pad when working on the system. • Disconnect the system from any telecommunications links, networks, or modems, and then disconnect the system power source before performing any of the procedures described in this guide. Failure to do so before you open the system or do any procedures can result in personal injury or equipment damage. NOTE: Disconnect the modem/telephone cable before disconnecting the power cable from the PC. To gain access to the inside of the computer, remove the side panel. WARNING: Before installing and connecting your system to the electrical power system, please read the safety information in the Warranty & Support Guide. 122 user's guide