Lenovo G40 Manual

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
1090 Keyboard bezel
For access, remove these FRUs in order:
• “1010 Battery pack” on page 33
• “1020 Base cover” on page 34
• “1030 Optical drive” on page 36
• “1040 Hard disk drive” on page 37
• “1070 Fan assembly” on page 42
• “1080 Keyboard” on page 44
Figure 9. Removal steps of keyboard bezel
Remove the screws  1.








Step
Screw (quantity) ColorTorque
1M2 × 3.5 mm, flat-head,...

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
Figure 9. Removal steps of keyboard bezel (continued)
Disconnect the touchpad cable connector and the power board connector in 
the directions shown by arrows 2 and 
3.




Remove the keyboard bezel in the direction shown by arrow 
4.
  

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
Figure 9. Removal steps of keyboard bezel (continued)
Remove the screw 5.

Step
Screw (quantity) ColorTorque
5M2 × 3.5 mm, flat-head, nylok-coated (1)  
Power BD to C Black
1.5 ~ 2.0 kgf*cm
Carefully remove the power board in the direction shown by arrow 
6.
  

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
1100 USB&audio board
For access, remove these FRUs in order:
• “1010 Battery pack” on page 33
• “1020 Base cover” on page 34
• “1030 Optical drive” on page 36
• “1040 Hard disk drive” on page 37
• “1050 PCI Express Mini Card for wireless LAN” on page 39
• “1070 Fan assembly” on page 42
• “1080 Keyboard” on page 44
• “1090 Keyboard bezel” on page 47
Figure 10. Removal steps of...

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
Figure 10. Removal steps of USB&audio board (continued)
Remove the USB&audio board 4.
4  

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
111 0  System board
Important notices for handling the system board:
When	handling	the	system	board,	bear	the	following	in	mind.
• 	 Be
	c
 areful
	n
 ot
	t
 o
	d
 rop
	t
 he
	sy
 stem
	b
 oard
	o
 n
	a	b
 ench
	t
 op
	t
 hat
	h
 as 	
a	h
 ard
	su
 rface,
	such

	 as 	 metal, 	 wood, 	 or 	 composite.
•	 Avoid
	 rough 	 handling 	 of 	 any 	 kind.
•	 During
	 the 	 whole...

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
Figure 11. Removal steps of system board (continued)
Unplug the speaker connector in the direction shown by arrow 3. Remove the 
screws  4 and 
5. 

Step
Screw (quantity) ColorTorque
4M2 × 3.5 mm, flat-head, nylok-coated (1)  
MB to D  Black
1.5 ~ 2.0 kgf*cm
5M2 × 3.5 mm, flat-head, nylok-coated (1)  
MB to D (on select models)  Black
1.5 ~ 2.0 kgf*cm  

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
Figure 11. Removal steps of system board (continued)
Remove the system board in the direction shown by arrow 6.
  

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Lenovo G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75
1120 Heat sink assembly
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 33
• “1020 Base cover” on page 34
• “1030 Optical drive” on page 36
• “1040 Hard disk drive” on page 37
• “1050 PCI Express Mini Card for wireless LAN” on page 39
• “1070 Fan assembly” on page 42
• “1080 Keyboard” on page 44
• “1090 Keyboard bezel” on page 47
• “1100 USB&audio board” on page 50
• “1110...

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G40-30/G40-45/G40-70/G40-70m/Z40-70/Z40-75 Hardware Maintenance Manual
1130 Speakers and DC-in cable
For access, remove these FRUs in order:
• “1010 Battery pack” on page 33
• “1020 Base cover” on page 34
• “1030 Optical drive” on page 36
• “1040 Hard disk drive” on page 37
• “1050 PCI Express Mini Card for wireless LAN” on page 39
• “1070 Fan assembly” on page 42
• “1080 Keyboard” on page 44 
• “1090 Keyboard bezel” on page 47
• “1100 USB&audio...