User manual PACKARD BELL ONETWO XX.U6Q [U83]

[. . . ] WARNING Ensure that the computer is disconnected from its power source and from all telecommunications links, networks, or modem lines whenever the chassis cover is removed. Electrostatic electricity can easily damage circuit cards and integrated circuits (ICs). To reduce risk of damage, store them in protective packaging whenever they are not installed in your system. Add-in cards can be extremely sensitive to ESD and always require careful handling. [. . . ] Add-in cards can be extremely sensitive to ESD and always require careful handling. After removing the card from the computer, place the card flat on a grounded, static-free surface, component-side up. Before you install or remove memory modules, video memory, disk drives, circuit cards or other devices, protect them from static electricity. Before picking up the device you (un)install, you should wear an antistatic wrist wrap (available at electronic supply stores). be sure to connect the wrist wrap to an unpainted metal portion of the computer chassis. As an alternative, you can dissipate electrostatic build-up by touching an unpainted metal portion of the computer chassis with one hand. Then touch the device you are (un)installing with the other hand, and maintain continuous contact with it until it is (un)installed in the computer. Under no circumstances should you attempt to disassemble the power supply. Inside the power supply are hazardous voltages that can cause serious personal injury. Gently push the latch that fixes the rear bezel to the chassis and carefully pull the bezel away from the chassis. Unlock the housing by applying pressure on the latches on both sides of the switch/LED assembly. Gently pull away the cable and the switch/LED assembly from the chassis. Note: When reassembling the switch/LED assembly, take care that you return it to its original position, i. To remove the CPU, first remove the rear bezel (see section Removing the Rear Bezel) and remove the side cover (see section Removing the Left Side Cover); then follow the steps below: 1. Remove the CPU fan and heat sink by pressing the metal clip on both sides of the heat sink until unlocks. Be very careful not to remove any of the heat paste on the CPU surface!To remove the optional system fan, first remove the rear bezel (see section Removing the Rear Bezel), remove the left side cover (see section Removing the Left Side Cover); then follow the steps below: 1. Take out the system fan by removing the screws, located on the back of the chassis, holding the system fan to the chassis. To remove the power supply unit, first remove the rear bezel (see section Removing the Rear Bezel), remove the left side cover (see section Removing the Left Side Cover), remove all add-in cards (see section Removing Add-In Cards), remove the CPU (see section Removing the CPU and/or the section Removing the Pentium 4 CPU), remove the optional system fan (see section Removing the System Fan); then follow the steps below: 1. 21: Disconnecting power cables from the motherboard 13 instructions on how to remove this component). [. . . ] To remove the power supply unit, first remove the rear bezel (see section Removing the Rear Bezel), remove the left side cover (see section Removing the Left Side Cover), remove all add-in cards (see section Removing Add-In Cards), remove the CPU (see section Removing the CPU and/or the section Removing the Pentium 4 CPU), remove the optional system fan (see section Removing the System Fan); then follow the steps below: 1. 21: Disconnecting power cables from the motherboard 13 instructions on how to remove this component). Remove the screws that hold the motherboard in place and carefully take out the motherboard from the chassis. To remove the power supply unit, first remove the rear bezel (see section Removing the Rear Bezel) and remove the side cover (see section Removing the Left Side Cover); then follow the steps below: 1. [. . . ]