Power Button Board - HP EliteBook 850 G4 Maintenance And Service Manual

Power button board

Description
Power button board assembly
NOTE: The power button board sits under the left display hinge. You do not have to remove the display to
remove the board, but you do have to rotate the left display hinge upward to gain access.
Before removing the 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 bottom cover (see
5. Remove the battery (see
6. Remove the internal base plate (see
7. Remove the fan/heatsink assembly (see
Remove the power button board:
1. Disconnect the cable from the system board (1).
2. Remove the Phillips broadhead M2.0×2.0 screw (2) that secures the power button board to the
computer.
3. Remove the 3 Phillips M2.5×5.0 screws (3) from the left display hinge.
4. Rotate the hinge upward to gain access to the board (4).
Bottom cover on page
Battery on page 38).
Internal base plate on page
Heat sink/fan assembly on page
34).
53)
55).
Component replacement procedures
Spare part number
914750-001
77