HP Pavilion d4000 Upgrading and Servicing Guide - Page 5

Safety Information This product has not been evaluated for connection to an "IT" power system (an AC distribution system with no direct connection to earth, according to IEC 60950). WARNING: Please read "Safety Information" in your user documentation before installing and connecting your computer to the electrical power system. • We recommend that you use an antistatic wrist strap and a conductive foam pad when working inside the PC. WARNING: Always disconnect the modem cord from the telephone system, and then disconnect the PC from the power source before removing the front and side panels of the PC. Failure to do so before you open the PC or do any procedures can result in personal injury or equipment damage. Opening and Closing the PC Preparing the PC Before you upgrade any component in your PC, you need to prepare the PC so that you can safely handle it and the components. Read the following items before attempting to upgrade or service the PC: • 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. • Write down and save the PC model and serial numbers, all installed options, and other information about the computer. It is easier to consult the information in this guide than to open and examine the PC. Before Opening the PC 1 Remove any diskette (floppy disk), memory card media, or optical disc (CD or DVD) from the PC. The PC power must be on to remove discs. 2 Click the Start button, and then click Turn Off Computer. Click Turn Off. 3 Disconnect the modem/telephone cable, if present. CAUTION: To reduce the risk of personal injury from electrical shock or hot surfaces, disconnect the power cord from the wall outlet, and allow the internal system components to cool before you touch them. 4 Disconnect the power cord from the electrical outlet and then from the PC. 5 Disconnect all other attached cables (such as the keyboard, mouse, and monitor) and all external devices. CAUTION: Static electricity can damage the electronic components of the PC or optional equipment. Ensure that you are discharged of static electricity by briefly touching a grounded metal object. Upgrading and Servicing Guide 1