USB board and security bracket
Description Spare part number
USB board for use only in models with GeForce GTX 1060 Max-Q graphics L20336-001
USB board for use all models without GeForce GTX 1060 Max-Q graphics L20337-001
USB board cable L20351-001
Security bracket L20353-001
Before removing the USB board and security bracket, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 36).
5. Remove the battery (see Battery on page 39).
6. Remove the hard drive (see Hard drive on page 47).
To remove the USB board and security bracket:
1. Disconnect the larger (system board) (1) and smaller (power button board) (2) cables from the USB
board ZIF connectors.
2. Remove the two Phillips M2.0×5.0 screws (3) that secure the security bracket to the computer.
3. Lift the bracket from on top of the board (4).
4. Remove the two Phillips M2.0×3.0 screws (5) that secure the USB board to the computer.
Component replacement procedures 55
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