User manual HP COMPAQ 6720S MAINTENANCE AND SERVICE GUIDE

[. . . ] HP Compaq 6720s Notebook PC Maintenance and Service Guide © Copyright 2007 Hewlett-Packard Development Company, L. P. AMD, the AMD Arrow logo, and combinations thereof, are trademarks of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its proprietor and used by Hewlett-Packard Company under license. Intel, Core, Pentium, Celeron are trademarks of Intel Corporation in the United States and other countries. [. . . ] Disconnect the wireless antenna cables from the WLAN module (see WLAN module on page 42). Keyboard (see Keyboard on page 50) Switch cover (see Switch cover on page 47) Speaker (see Speaker on page 53) Display lid switch module (see Display lid switch module on page 54) Remove the display assembly: 1. Disconnect the display panel cables (1) and (2) from the system board. Remove the wireless antenna cables (3) from the clips and routing channels built into the top cover. Component replacement procedures 55 3. 4. Remove the four Torx T8M2. 5×7. 0 screws (1) that secure the display assembly to the computer. Lift the display assembly (2) straight up and remove it. 5. If it is necessary to replace the display bezel, display inverter, or display hinges, remove the eight rubber screw covers (1) and the eight Torx T8M2. 5×6. 0 screws (2) that secure the display bezel to the display assembly. The rubber screw covers are available in the Rubber Kit, spare part number 456616-001. 6. Flex the inside edges of the left and right sides (1) and the top and bottom sides (2) of the display bezel until the bezel disengages from the display enclosure. 56 Chapter 4 Removal and replacement procedures 7. Remove the display bezel (3). The display bezel is available using spare part number 456807-001. 8. 9. If it is necessary to replace the display inverter, remove the inverter (1) from the display enclosure as far as the display panel cable and the backlight cable will allow. Disconnect the display panel cable (2) and the backlight cable (3) from the display inverter. 10. The display inverter is available using spare part number 456618-001. If it is necessary to replace the display hinges, remove the four Torx T8M2. 5×6. 0 screws (1) that secure the display panel to the display enclosure. Component replacement procedures 57 12. Remove the four Phillips PM2. 0×4. 0 screws (1) that secure each display hinge to the display panel. The left and right display hinges are available using spare part number 456806-001. Reverse this procedure to reassemble and install the display assembly. 58 Chapter 4 Removal and replacement procedures Top cover Description Top cover Spare part number 456803-001 Before removing the top cover, follow these steps: 1. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. Disconnect all external devices connected to the computer. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. Remove the battery (see Battery on page 39). Hard drive (see Hard drive on page 40) Optical drive (see Optical drive on page 46) Keyboard (see Keyboard on page 50) Switch cover (see Switch cover on page 47) Speaker (see Speaker on page 53) Display lid switch module (see Display lid switch module on page 54) Display assembly (see Display assembly on page 55) Remove the top cover: 1. Turn the computer upside down, with the front toward you. Component replacement procedures 59 2. Remove the followng screws: (1) Three Phillips PM2. 0×2. 0 broad-head screws (2) Seven Torx T8M2. 5×7. 0 screws (3) One Torx T8m2. 5×4. 0 screw 3. 6. Turn the computer right-side up, with the left side toward you. Press in on the ExpressCard slot eject button (1) two times. [. . . ] For disposal or recycling information, contact your local authorities, or see the Electronic Industries Alliance (EIA) Web site at http://www. eiae. org. This section provides disassembly instructions for the display assembly. The display assembly must be disassembled to gain access to the backlight (1) and the liquid crystal display (LCD) panel (2). NOTE: The procedures provided in this appendix are general disassembly instructions. Specific details, such as screw sizes, quantities, and locations, and component shapes and sizes, can vary from one computer model to another. Battery 137 Perform the following steps to disassemble the display assembly: 1. [. . . ]