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Description Spare part number
B970, 2.3-GHz, with 2-MB L3 cache 676785-001
Intel Celeron processor
B840, 1.9-GHz, with 2-MB L3 cache 664663-001
Before removing the processor, 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 31).
5. Remove the following components:
a. Bottom door (see
Bottom door on page 33)
b. Hard drive (see
Hard drive on page 37)
c. Optical drive (see
Optical drive on page 35)
d. WLAN module (see
WLAN/Bluetooth combo card on page 43)
e. WWAN module (see
WWAN module on page 41)
f. Keyboard (see
Keyboard on page 45)
g. Top cover (see
Top cover on page 47)
h. System board (see
System board on page 61)
i. Heat sink (see
Heat sink on page 63)
Remove the processor:
1. Position the system board upside-down.
2. Use a flat-bladed screwdriver to turn the processor locking screw (1) one-half turn
counterclockwise until you hear a click.
Component replacement procedures 67