Lenovo G50 Manitenance Manual

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Lenovo G50-70/G50-70m/Z50-70
Figure 9. Removal steps of keyboard bezel (continued)
Disconnect	the	touchpad	 cable	connector	 and	the	power	 board	connector	 in	the	directions	shown	by	arrows	3	and	4.



Remove	the	keyboard	bezel	in	the	direction	shown	by	arrow	5.
 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Figure 9. Removal steps of keyboard bezel (continued)
Remove	the	screw	6.

StepScrew (quantity)ColorTorque
6M2	×	3.5	mm,	flat-head,	nylok-coated	(1)	Power	BD+CBlack1.5	~	2.0	kgf*cm
Carefully	remove	the	power	board	in	the	direction	shown	by	arrow	7.
 
						

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Lenovo G50-70/G50-70m/Z50-70
1100 ODD board and USB&audio board
For	access,	remove	these	FRUs	in	order:
•	“1010	Battery	pack”	on	page	32
•	“1020	Base	cover”	on	page	33
•	“1030	Optical	drive”	on	page	35
•	“1040	Hard	disk	drive”	on	page	36
•	“1050	PCI	Express	Mini	Card	for	wireless	LAN”	on	page	38
•	“1070	Fan	assembly”	on	page	41
•	“1080	Keyboard”	on	page	43
•	“1090	Keyboard	bezel”	on	page	46
Figure 10. Removal steps of ODD board and USB&audio board 
Detach	the	ODD	 board	 connector	 in	the	 directions	 shown	by	arrows	1	and	2.	Remove	the	screw	3.



StepScrew (quantity)ColorTorque
3M2	×	3.5	mm,	flat-head,	nylok-coated	(1)	ODD	board	+	D	Black1.5	~	2.0	kgf*cm 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Figure 10. Removal steps of ODD board and USB&audio board (continued)
Remove	the	ODD	board	4.
 
						

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Lenovo G50-70/G50-70m/Z50-70
Figure 10. Removal steps of ODD board and USB&audio board (continued)
Detach	the	USB&audio	 board	connector	 in	the	 directions	 shown	by	arrows	5	and	6.	Remove	the	screw	7.



StepScrew (quantity)ColorTorque
7M2	×	3.5	mm,	flat-head,	nylok-coated	(1)	USB	board	+	D	Black1.5	~	2.0		kgf*cm 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Figure 10. Removal steps of ODD board and USB&audio board (continued)
Remove	the	USB&audio	board	8.
 
						

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Lenovo G50-70/G50-70m/Z50-70
111 0  System board
Important notices for handling the system board:
When handling the system board, bear the following in mind.
•  Be  careful  not  to  drop  the  system  board  on  a  bench  top  that  has  a  hard  surface, 
such as metal, wood, or composite.
•  Avoid rough handling of any kind.
•  During the whole process, make sure not to drop or stack the system board.
•  If you put a system board down, make sure to put it only on a padded surface such 
as an ESD mat or conductive corrugated material.
For	access,	remove	these	FRUs	in	order:	
•	“1010	Battery	pack”	on	page	32
•	“1020	Base	cover”	on	page	33
•	“1030	Optical	drive”	on	page	35
•	“1040	Hard	disk	drive”	on	page	36
•	“1050	PCI	Express	Mini	Card	for	wireless	LAN”	on	page	38
•	“1070	Fan	assembly”	on	page	41
•	“1080	Keyboard”	on	page	43
•	“1090	Keyboard	bezel”	on	page	46
•	“1100	ODD	board	and	USB&audio	board”	on	page	49
Figure 11. Removal steps of system board
Disconnect	the	two	connectors	in	the	directions	shown	by	arrows	1	and	2.	

 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
Figure 11. Removal steps of system board (continued)
Unplug	the	speaker 	connector	 in	the	 direction	 shown	by	arrow	3.	Remove	 the	screws	4.	



StepScrew (quantity)ColorTorque
4M2	×	3.5	mm,	flat-head,	nylok-coated	(3)	MB	+	D	Black1.5	~	2.0	kgf*cm 
						

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Lenovo G50-70/G50-70m/Z50-70
Figure 11. Removal steps of system board (continued)
Remove	the	system	board	in	the	direction	shown	by	arrow	5.
 
						

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G50-70/G50-70m/Z50-70 Hardware Maintenance Manual
1120 Heat sink assembly
For	access,	remove	these	FRUs	in	order:	
•	“1010	Battery	pack”	on	page	32
•	“1020	Base	cover”	on	page	33
•	“1030	Optical	drive”	on	page	35
•	“1040	Hard	disk	drive”	on	page	36
•	“1050	PCI	Express	Mini	Card	for	wireless	LAN”	on	page	38
•	“1070	Fan	assembly”	on	page	41
•	“1080	Keyboard”	on	page	43
•	“1090	Keyboard	bezel”	on	page	46
•	“1100	ODD	board	and	USB&audio	board”	on	page	49
•	“1110	System	board”	on	page	53
Figure 12. Removal steps of heat sink assembly
Remove	the	screws	1.


StepScrew (quantity)ColorTorque
1M2	×	3.5	mm,	flat-head,	nylok-coated	(4)	thermal+MB	Black1.5	~	2.0	kgf*cm
Lift	the	heat	sink	assembly	in	the	direction	shown	by	arrow	2.