7. Remove the system board (7) by lifting it straight up.
Reverse this procedure to install the system board.
Security lock
The security lock is included with the base enclosure assembly, spare part number 652535-001.
Before removing the security lock, 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 battery (see
Battery on page 45).
5. Remove the service access cover (see
Service access cover on page 46).
6. Remove the optical drive (see
Optical drive on page 58) or upgrade bay hard drive (see Upgrade
bay hard drive on page 60).
7. Remove the keyboard (see
Keyboard on page 65).
8. Remove the top cover (see
Top cover on page 81).
9. Remove the display assembly (see
Display assembly on page 85).
10. Remove the fan/graphics board heat sink (see
Fan/graphics board heat sink assembly
on page 68).
11. Remove the processor heat sink (see
Processor heat sink on page 73).
12. Remove the Audio/USB 2.0 board (see
Audio/USB 2.0 board on page 96).
13. Remove the speaker assembly (see
Speaker assembly on page 98).
110 Chapter 4 Removal and replacement procedures
