System board
Description Spare part number
System board (includes replacement thermal material)
●
Includes Intel Core i3-2310M, Dual-Core, 2.10 GHz, 3 MB L3 cache, 4 threads (35 W)—for
all countries except Russia and the People's Republic of China
650402-001
●
Includes Intel Core i5-2520M, Dual-Core, 2.50 GHz (Turbo up to 3.20 GHz), 3 MB L3 cache,
4 threads (35 W)—for all countries except Russia and the People's Republic of China
650403-001
●
Includes Intel Core i3-2310M, Dual-Core, 2.10 GHz, 3 MB L3 cache, 4 threads (35 W)--for
Russia and the People's Republic of China only
656796-001
●
Includes Intel Core i5-2520M, Dual-Core, 2.50 GHz (Turbo up to 3.20 GHz), 3 MB L3 cache,
4 threads (35 W) --for Russia and the People's Republic of China only
656797-001
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 battery (see
Battery on page 37).
5. Remove the service access cover (see
Service access cover on page 39).
6. Remove the keyboard (see
Keyboard on page 52).
7. Remove the fan (see
Fan on page 55).
8. Remove the top cover (see
Top cover on page 57).
9. Remove the speakers (see
Speakers on page 67).
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:
●
Memory module (see
Memory module on page 41)
●
WLAN module (see
WLAN module on page 42)
●
WWAN module (see
WWAN module on page 46)
●
SIM (see
SIM on page 40)
●
Fan (see
Fan on page 55)
●
RTC battery (see
RTC battery on page 66)
Remove the system board:
1. Position the computer right-side up, with the front toward you.
68 Chapter 4 Removal and replacement procedures