HP 6720s HP Compaq 6720s Notebook PC - Maintenance and Service Guide - Page 79
Heat sink, Display lid switch module see
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Heat sink Description Heat sink (includes replacement thermal material) Spare part number 456605-001 Before removing the heat sink, follow these steps: 1. Shut down the computer. 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. 2. Disconnect all external devices connected to the computer. 3. 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. 4. Remove the battery (see Battery on page 39). 5. Remove the following components: a. Hard drive (see Hard drive on page 40) b. Optical drive (see Optical drive on page 46) c. Keyboard (see Keyboard on page 50) d. Switch cover (see Switch cover on page 47) e. Speaker (see Speaker on page 53) f. Display lid switch module (see Display lid switch module on page 54) g. Display assembly (see Display assembly on page 55) h. Top cover (see Top cover on page 59) i. System board (see System board on page 65) Remove the heat sink: 1. Turn the system board upside down, with the USB connectors toward you. 2. In the 1, 2, 3, 4 sequence stamped into the heat sink, loosen the four Phillips PM2.5×10.0 screws (1) that secure the heat sink to the system board. Component replacement procedures 71