Before removing the I/O board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 66).
2. Remove the service cover (Service cover on page 40), and then remove the following components:
1. Battery (see Battery on page 41)
2. Solid-state drives 3 and 4 (see Solid-state drives 3 and 4 on page 42)
3. Solid-state drive carrier (see Solid-state drives 3 and 4 on page 42)
4. Hard drive (see Hard drive on page 44)
5. Keyboard (see Keyboard on page 54)
6. Fan/heat sink assembly (see Fan/heat sink assembly on page 79)
7. System board (see System board on page 89)
Remove the I/O board:
1. Remove the three Phillips M2.5 × 6.0 screws (1) that secure the I/O board to the computer.
2. Remove the Phillips M2.5 × 3.6 screw (2) that secures the I/O board to the computer.
96 Chapter 6 Removal and replacement procedures for authorized service provider parts ENWW
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