Lenovo 3000 C300/C305 Hardware Maintenance Manual

Chapter 7. Replacing hardware
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8. Place the system board upside down on a flat surface.
9. Remove the CPU heat sink. Refer to the steps 3 to 8 of the “Replacing
the CPU heat sink” section.
10. Remove the memory module. Refer to the step 6 of the “Replacing a
memory module” section.
11. Install the memory module on the new system board. Refer to the step
7 of the “Replacing a memory module” section.
12. Install the CPU heat sink on the new system board. Refer to the steps 9
to 10 of the “Replacing the CPU heat sink” section.
13. Connect related cables to the underside of the system board. Place the
new system board upside down.
14. Place the new system board into the chassis, aligning the screw holes
on the system board with the mounting holes on the chassis.
15. Screw back the eight screws on the new system board.
16. Install the TV tuner card on the upside of the new system board. Refer
to the step 6 to 8 of the “Replacing the TV tuner card” section.
17. Install the wireless card on the upside of the new system board. Refer
to the step 6 to 8 of the “Replacing the wireless card” section.
18. Connect related cables to the upside of the system board.
19. Install the LCD panel. Refer to steps 5 to 6 of the “Replacing the LCD
panel” section.
20. Install the computer cover. Refer to “Completing the installation” .
Replacing the keyboard and mouse
Attention
Do not remove the computer cover or attempt any repair before
reading the “Important safety information” in the Safety and Warranty
Guide that was included with your computer or in the Hardware
Maintenance Manual (HMM) for the computer. To obtain copies of the
Safety and Warranty Guide or HMM, go to the Support Web site at
http://consumersupport.lenovo.com.
To replace the keyboard:
1. Remove any media (diskettes, CDs, or memory cards) from the drives,
shut down your operating system, and turn off all attached devices
and the computer.