HP 4510s Service Guide - Page 118

Heat sink and fan NOTE: The heat sink spare part kit includes replacement thermal material. Description Heat sink for use in computers with UMA graphics subsystems Heat sink for use in computers with discrete graphics subsystems Fan Spare part number 535859-001 535767-001 535766-001 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 63). 5. Remove the following components: a. Switch cover and keyboard (see Switch cover and keyboard on page 64) b. Speakers (see Speakers on page 73) c. Optical drive (see Optical drive on page 69) d. Palm rest (see Palm rest on page 75) e. Top cover (see Top cover on page 90) Remove the heat sink: NOTE: Steps 1 through 3 apply to computers with discrete subsystem memory on the system board. Steps 4 through 6 apply to computers with UMA subsystem memory. Step 7 shows how to remove the fan from the heat sink. 1. Position the computer right-side up with the front toward you. 2. Following the sequence stamped into the heat sink, loosen the seven screws (1), (2), (3), (4), (5), (6), (7) around the processor. 106 Chapter 4 Removal and replacement procedures