Lenovo G510 Service Manual

							Lenovo G400/G500/G405/G505/G410/G510
57
Figure 10. Removal steps of system board
G500: Loosen two screws  , detach the system board connector in the direction 
shown by arrow   and remove the switch board.
Loosen three screws  . Detach LCD connector in the direction shown by arrow 
, unplug the USB board and optical disk drive board connectors in the 
direction shown by arrows  . Unplug  the DC-IN cable , back-up battery and 
speakers connectors in the direction shown by arrows  .
G500:
a
b
aa
b
a
bc
d
a
a
a
c
b 
						

							Lenovo G400/G500/G405/G505/G410/G510 Hardware Maintenance 
Manual
58
Figure 10. Removal steps of system board (continued)
G505:
G500:
a
a
a
c
b
d
d 
						

							Lenovo G400/G500/G405/G505/G410/G510
59
Figure 10. Removal steps of system board (continued)
G505:
When installing: Make sure that all the connectors are attached firmly.
Remove the system board in the direction shown by arrow  .
StepScrew (quantity)ColorTorque
M2.5 × 4 mm, flat-head, nylok-coated (3) Black 2.0 ~2.5 kgfcm
d
d
a
e
aa
e 
						

							Lenovo G400/G500/G405/G505/G410/G510 Hardware Maintenance 
Manual
60
Figure 10. Removal steps of system board (continued)
G505:
When installing: When attaching the system board to the base cover, adjust the 
placement of the ports as shown in  , and make sure that both of the USB ports 
and the microphone jack are attached to the holes on the base cover as shown in 
. Improper placement of the ports or those jacks might cause a damage.
aa
e 
						

							Lenovo G400/G500/G405/G505/G410/G510
61 1110 LCD unit
For access, remove these FRUs in order:
 “1010 Battery pack” on page 36
 “1020 Dummy card” on page 37
 “1030 Hard disk drive(HDD)/Memory/Mini PCI Express Card slot 
compartment cover” on page 38
 “1040 Hard disk drive” on page 39
 “1050 Optical drive” on page 42
 “1060 DIMM” on page 44
 “1070 PCI Express Mini Card for wireless LAN/WAN” on page 45
 “1080 Keyboard” on page 47
 “1090 Keyboard bezel” on page 51
 “1100 System board” on page 55
Figure 11. Removal steps of LCD unit
G400: Remove four screws  .
StepScrew (quantity)ColorTorque
M2.5 × 6 flat-head, nylok-coated (4)  White  1.5 ~2.0 kgfcm
a
a
aaa
a 
						

							Lenovo G400/G500/G405/G505/G410/G510 Hardware Maintenance 
Manual
62
Figure 11. Removal steps of LCD unit (continued)
G500: Release the antenna cables from the cable guides in the direction shown by 
arrows  . Remove four screws  .
When installing:
 Route the antenna cables along the cable guides. As you route the cables, 
make sure that they are not subjected to any tension. Tension could cause the 
cables to be damaged by the cable guides, or a wire to be broken.
 Make sure that the LCD connector is attached firmly and make sure that you 
do not pinch the antenna cables when you attach the LCD assembly. Route 
the LCD cable along the cable guides.
StepScrew (quantity)ColorTorque
M2.5 × 5 mm, flat-head, nylok-coated 
(4)Black 2.0 ~ 2.5 kgfcm
ab
b
bb
b
aa
b 
						

							Lenovo G400/G500/G405/G505/G410/G510
63
Figure 11. Removal steps of LCD unit (continued)
Remove the LCD unit in the direction shown by arrows  .
c
c
c 
						

							Lenovo G400/G500/G405/G505/G410/G510 Hardware Maintenance 
Manual
641120 Fan assembly and Heat Sink assembly
For access, remove these FRUs in order:
 “1010 Battery pack” on page 36
 “1020 Dummy card” on page 37
 “1030 Hard disk drive(HDD)/Memory/Mini PCI Express Card slot 
compartment cover” on page 38
 “1040 Hard disk drive” on page 39
 “1050 Optical drive” on page 42
 “1060 DIMM” on page 44
 “1070 PCI Express Mini Card for wireless LAN/WAN” on page 45
 “1080 Keyboard” on page 47
 “1090 Keyboard bezel” on page 51
 “1100 System board” on page 55 
						

							Lenovo G400/G500/G405/G505/G410/G510
65
Figure 12. Removal steps of fan assembly and heat sink assembly (continued)
Detach the fan connector in the direction shown by arrow   loosen three 
screws   and two screws   to lift the fan assembly.
abc
a
bb
c
cb 
						

							Lenovo G400/G500/G405/G505/G410/G510 Hardware Maintenance 
Manual
66
Figure 12. Removal steps of fan assembly and heat sink assembly (continued)
G405:
a
c
c
b
bb