System board
NOTE: The system board spare part kits include replacement thermal material.
Description Spare part number
For use in all countries and regions except Russia and the People's Republic of China:
● Equipped with Intel Core i7-2620M 2620M, 2.7 GHz (turbo up to 3.4mGHz) processor, 4 MB
L3 cache, 35W
649748-001
● Equipped with Intel Core i5-2410M, 2.3 GHz (turbo up to 2.9 GHz) processor, 3 MB L3
cache, 35W (select models only)
649745-001
● Equipped with Intel Core i5-2520M, 2.5 GHz (turbo up to 3.2 GHz) processor, 3 MB L3
cache, 35W
649746-001
For use only in Russia and the People's Republic of China:
●
Equipped with Second Generation Intel Core i5-2410M Dual-Core processor [2.3 GHz (turbo
up to 2.9 GHz), 3 MB L3 cache]
649749-001
●
quipped with Second Generation Intel Core i5-2520M Dual-Core processor [2.5 GHz (turbo
up to 3.2 GHz), 3 MB L3 cache]
649750-001
●
Equipped with Second Generation Intel Core i5-2540M Dual-Core processor [2.6 GHz (turbo
up to 3.3 GHz), 3 MB L3 cache]
649751-001
●
Equipped with Second Generation Intel Core i7-2620M Dual-Core processor [2.7 GHz (turbo
up to 3.4 GHz), 4 MB L3 cache]
649752-001
Before removing the system board, 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 following components:
a. Remove the battery (see
Battery on page 41)
b. Remove the service access cover (see
Service access cover on page 42)
c. Remove the SIM card (see
SIM on page 45)
d. Remove the memory module (see
Primary memory module on page 43)
e. Remove the hard drive (see
Hard drive on page 46)
f. Remove the WLAN module (see
WLAN module on page 48)
g. Remove the WWAN module (see
WWAN module on page 51)
h. Remove the keyboard (see
Keyboard on page 53)
i. Remove the top cover (see
Top cover on page 57)
j. Remove the RTC battery (see
RTC battery on page 62)
k. Remove the display assembly (see
Display assembly on page 63)
76 Chapter 4 Removal and replacement procedures
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