Specifications

Before removing the system board, 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 63), and then remove the following components:
a. Service cover (see
Service cover on page 64)
b. Hard drive (see
Hard drive on page 65)
c. Optical drive (see
Optical drive on page 76)
d. Fan/heat sink assembly (see
Fan and heat sink assembly on page 85)
e. Keyboard (see
Keyboard on page 79)
f. Display assembly (see
Display assembly on page 115)
g. Base enclosure (see
Base enclosure on page 89)
h. USB board (see
USB board on page 92)
NOTE: 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:
●
WWAN module (see
WWAN module (select models only) on page 73)
●
Solid-state drive (see
Solid-state drive on page 78)
●
WLAN module (see
WLAN module on page 74)
●
Expansion memory (see
Primary memory module on page 68)
● Primary memory (see
Expansion memory module on page 71)
●
Smart card reader (see
Smart card reader on page 98)
●
Processor (see
Processor on page 108)
System board 101