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3. Release the power connector (3) from the retention clips built into the base enclosure.
4. Remove the power connector cable.
Reverse this procedure to install the power connector cable.
Hall sensor board
Description Spare part number
Hall sensor board (includes cable) 740149-001
Before removing the hall sensor board, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the keyboard/top cover (see
Keyboard/top cover on page 23).
5. Disconnect the battery cable from the system board (see
Speakers on page 26).
Remove the hall sensor board:
1. Release the ZIF connector (1) to which the hall sensor board cable is attached, and then
disconnect the hall sensor board cable from the USB board.
2. Remove the Phillips PM2.5×4.5 screw (2) that secures the hall sensor board to the base enclosure.
Component replacement procedures
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