1. Release the ZIF connector (1) to which the hard drive LED board cable is attached, and then disconnect
the hard drive LED board cable from the system board.
2. Remove the Phillips PM2.0×3.7 broad head screw (2) that secures the hard drive LED board to the
base enclosure.
3. Remove the hard drive LED board (3).
Reverse this procedure to install the hard drive LED board.
Counterweight
Description Spare part number
Counterweight 809864-001
Before removing the counterweight, 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 battery (see Battery on page 24), and then remove the following components:
a. Bottom cover (see Bottom cover on page 26)
b. Hard drive (see Hard drive on page 28)
c. Keyboard/top cover (see Keyboard/top cover on page 48)
Remove the counterweight:
1. Remove the two Phillips PM2.5×5.4 screws (1) that secure the counterweight to the base enclosure.
Component replacement procedures 53
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