HP ProBook 4340s HP ProBook 4340s Notebook PC HP ProBook 4341s Notebook PC - M - Page 64
Function board/Power button board, Position the top cover upside-down.
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Function board/Power button board Description Function board/Power button board (includes cable) Spare part number 684240-001 Before removing the function board and power button board, 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 31). 5. Remove the following components: a. Bottom door (see Bottom door on page 33). b. Keyboard (see Keyboard on page 45) c. Top cover (see Top cover on page 47) Remove the function board/power button board assembly: 1. Position the top cover upside-down. 2. Remove the three Phillips PM2.0×3.0 screws (1) that secure the boards to the top cover. NOTE: The function board is secured with two screws. The power button board is secured with one screw. 3. Remove the function board from the top cover (2). 56 Chapter 4 Removal and replacement procedures