Removal and replacement procedures
Maintenance and Service Guide
4–33
System board
✎
The system board spare part kit includes a processor and replacement thermal material.
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 4-7
).
5. Remove the following components:
a. Accessory cover (see
“Mass storage device” on page 4-9
)
b. Keyboard (see
“Keyboard” on page 4-23
)
c. Button board and cable (see
“Button board and cable” on page 4-26
)
d. Top cover (see
“Top cover” on page 4-28
)
When replacing the system board, be sure that the following additional components are removed from the defective
system board and installed on the replacement system board:
■
SIM (see
“SIM” on page 4-8
)
■
Bluetooth module (see
“Bluetooth module” on page 4-12
)
■
WLAN module (see
“WLAN module” on page 4-14
)
■
WWAN module (see
“WWAN module” on page 4-17
)
■
RTC battery (see
“RTC battery” on page 4-20
)
■
Memory module (see
“Memory module” on page 4-21
)
■
Bluetooth module cable (see
“Bluetooth module cable” on page 4-32
)
■
Fan and heat sink (see
“Fan and heat sink” on page 4-36
)
Description
Spare part number
Intel® Dual Core i5-45M 2.40-GHz processor (Turbo up to 2.53 GHz), 3-M L3 cache, 4 threads
(35W)
618821-001
Intel® Dual Core i5-45M 2.40-GHz processor (Turbo up to 2.53 GHz), 3-M L3 cache, 4 threads
(35W), for use in China and Russia
618822-001
Intel Dual Core i3-370M 2.40-GHz processor, 3-M L3 cache, 4 threads (35W)
618819-001
Intel Dual Core i3-370M 2.40-GHz processor, 3-M L3 cache, 4 threads (35W), for use in China and
Russia
618820-001
Intel Dual Core i3-350M 2.26-GHz processor, 3-M L3 cache, 4 threads (35W)
618817-001
Intel Dual Core i3-350M 2.26-GHz processor, 3-M L3 cache, 4 threads (35W), for use in China and
Russia
618818-001
Intel U3400 1.06-GHz processor
618823-001
Intel U3400 1.06-GHz processor, for use in China and Russia
618824-001
