j.Remove the RTC battery (see RTC battery on page 65)

k.Remove the display assembly (see Display assembly on page 66)

l.Remove the system board shield (see System board shield on page 69)

m.Remove the smart card reader (see Smart card reader on page 78)

When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board:

●Remove the SIM (see SIM on page 47)

●Remove the memory modules (see Primary memory module on page 45 and Secondary memory module on page 58)

●Remove the WLAN module (see WLAN module on page 50)

●Remove the WWAN module (see WWAN module on page 53)

●Remove the modem module (see Modem module on page 70)

●Remove the heat sink (see Fan/heat sink assembly on page 82)

Remove the system board:

1.Position the computer right-side up, with the front toward you.

2.Remove the ExpressCard or ExpressCard slot holder.

3.Peel back the adhesive strip (2) on the system board to reveal one of the two screws required to remove the system board.

4.Remove the two Phillips M2.0×4.0 screws (2) that secure the system board to the base enclosure.

Component replacement procedures

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