Lenovo G50 User Manual

							Appendix A. CRU instructions
45
0Reconnect the two wireless LAN cables (one black, one grey).
AReinstall the compartment cover and tighten the screws.
BReinstall the battery pack.
CTurn the computer over again. 
DConnect the AC power adapter and the cables to the computer.
Note: When installing or reinstalling the wireless card:
•In models with a wireless LAN card that has two cables:
  Plug the black cable (MAIN) into the jack labeled M(Main).
  Plug the grey cable (AUX) into the jack labeled A(Aux).
•In models with a wireless LAN card that has only one cable, plug the black cable 
(MAIN) into the jack labeled M(Main). 
						

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Appendix A. CRU instructions
Replacing the thermal fan (Lenovo G50-30/
G50-45/G50-70/G50-70m/G50-80/G50-80 Touch/
Z50-70/Z50-75) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To  r e p l a c e  the thermal fan, do the following:
1Turn off the computer. Disconnect the AC power adapter and all cables 
from the computer.
2Close the computer display and turn the computer over.
3Remove the battery pack.
4Remove the Optical drive/Hard disk drive/Memory/Central processing 
unit/Mini PCI Express Card slot compartment cover.
5Disconnect the thermal fan connector in the direction shown by 
arrow .
Note: For the Lenovo G40-30/G50-30, select models (computers with UMA architecture) do 
not have a thermal fan.
Note: Be careful not to damage the thermal fan connector.
a
1 
						

							Appendix A. CRU instructions
47
6Remove the screws that secure the thermal fan  .
7Remove the thermal fan  .
8Install the new thermal fan and reconnect the thermal fan connector. 
Make sure that the connector is attached firmly.
9Reinstall and tighten the screws.
0Reinstall the compartment cover and tighten the screws.
AReinstall the battery pack.
BTurn the computer over again.
CConnect the AC power adapter and the cables to the computer.
b
22
2
c
3 
						

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Appendix A. CRU instructions
Replacing the keyboard - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To  r e p l a c e  the keyboard, do the following:
1Turn off the computer. Disconnect the AC power adapter and all cables 
from the computer.
2Close the computer display and turn the computer over.
3Remove the battery pack.
4Remove the Optical drive/Hard disk drive/Memory/Central processing 
unit/Mini PCI Express Card slot compartment cover.
5Remove the screws that secure the keyboard  .
Lenovo G40-30/G40-45/G40-70/G40-70m/G40-80/Z40-70/Z40-75
a
1
1
1 
						

							Appendix A. CRU instructions
49
Lenovo G50-30/G50-45/G50-70/G50-70m/G50-80/G50-80 Touch/
Z50-70/Z50-75
6Push the area of the keyboard highlighted and shown by arrow   to 
loosen.
Lenovo G40-30/G40-45/G40-70/G40-70m/G40-80/Z40-70/Z40-75
1
1
1
b
2 
						

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Appendix A. CRU instructions
Lenovo G50-30/G50-45/G50-70/G50-70m/G50-80/G50-80 Touch/
Z50-70/Z50-75
7Loosen the keyboard with fingers , and then lift the keyboard 
slightly .
Lenovo G40-30/G40-45/G40-70/G40-70m/G40-80/Z40-70/Z40-75
2
c
d
4
3
3 
						

							Appendix A. CRU instructions
51
Lenovo G50-30/G50-45/G50-70/G50-70m/G50-80/G50-80 Touch/
Z50-70/Z50-75
8Disconnect the keyboard connector in the direction shown by arrows    
and  . Then remove the keyboard.
Lenovo G40-30/G40-45/G40-70/G40-70m/G40-80/Z40-70/Z40-75
4
3
3
e
f
56 
						

							52
Appendix A. CRU instructions
Lenovo G50-30/G50-45/G50-70/G50-70m/G50-80/G50-80 Touch/
Z50-70/Z50-75
9Reconnect the keyboard connector and install the new keyboard. Push 
the keyboard in gently until it clicks into place.
0Close the computer display and turn the computer over.
AReinstall and tighten the screws.
BReinstall the compartment cover and tighten the screws.
CReinstall the battery pack.
DTurn the computer over again.
EConnect the AC power adapter and the cables to the computer.
Note: Make sure that the keyboard connector is attached firmly.
56 
						

							Appendix A. CRU instructions
53
Removing the optical drive - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To  r e m ove the optical drive, do the following:
1Remove the Optical drive/Hard disk drive/Memory/Central processing
unit/Mini PCI Express Card slot compartment cover.
2Remove the screw shown in the illustration .
3Gently pull the optical drive out .
a
b
21 
						

							54
Appendix A. CRU instructions
The following table provides a list of CRUs (Customer Replaceable Units) for 
your computer and informs you of where to find replacement instructions.
Safety, Warranty, 
and Setup GuideUser Guide
AC power adapter O
Power cord for AC power adapter O
Battery pack O O
Bottom access doors O
Hard disk drive O
Memory O
Wireless LAN card O
Thermal Fan O
Keyboard O
Optical drive O