HP ProBook 4445s HP ProBook 4445s Notebook PC HP ProBook 4446s Notebook PC - M - Page 68
Speaker, Top cover see
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Speaker Description Speaker Spare part number 683665-001 Before removing the speaker, 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 following components: a. Battery (see Battery on page 33). b. Bottom door (see Bottom door on page 34). c. Hard drive (see Hard drive on page 38) d. Optical drive (see Optical drive on page 35) e. Memory (see Memory modules on page 40) f. WLAN module (see WLAN/Bluetooth combo card on page 42) g. Keyboard (see Keyboard on page 44) h. Metal heat shield (see Metal heat shield on page 46) i. Fan (see Fan on page 47) j. Top cover (see Top cover on page 48) Remove the speaker. 1. Position the top cover in the normal upright position with the lid in the open position. 2. Disconnect the speaker cable (1) from the system board. 3. Remove the two screws (2) that secure the speaker. 60 Chapter 4 Removal and replacement procedures