Lenovo B305 Service Manual

							Chapter 8. Replacing hardware
      39
6. Slide the hard disk drive out of the bay. 
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7. Install the new hard disk drive.
  (1)  Slide the new hard disk drive into the drive bay.
  (2)  Screw back the 4 screws on the drive bay.
8.  Connect the data and power cables back to the hard disk drive.
9.  Align the 4 screw holes in the hard disk drive bay with the mounting 
holes in the chassis, then screw it back.
10.  Install the computer cover and stand.
Replacing the bluetooth module
To replace the bluetooth module:
1. Remove the computer stand. Refer to “Removing the computer stand”.
2.  Remove the computer cover. Refer to “Removing the computer cover”.
3.  Remove the tape on the top of the bluetooth module.
4.  Pull the pins to each side to release the bluetooth module.
5.  Lift up the bluetooth mudule. 
						

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6. Disconnect the antenna cable from the bluetooth module.
7. Connect the antenna cable to the new bluetooth module.
8.  Align then install the bluetooth module.
9.  Reattach the tape to the bluetooth module.
10. Install the computer cover and stand.
Removing the motherboard cover
1.  Remove the computer stand. Refer to “Removing the computer stand”.
2.  Remove the computer cover. Refer to “Removing the computer cover”.
3.  Remove the 4 screws that secure the motherboard cover to the 
computer chassis.
 
4. Lift up the motherboard cover. 
						

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      41
5. Disconnect the motherboard fan power cable.
Replacing the heatsink
To remove the heatsink:
1. Removing the computer stand. Refer to “Removing the computer stand”.
2.  Removing the computer cover. Refer to “Removing the computer 
cover”.
3.  Removing the motherboard cover. Refer to “Removing the 
motherboard cover”.
4.  Remove the 4 screws that secure the heatsink to the chassis. 
						

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5. Lift up the heatsink.
6. Align then install the new heatsink.
7.  Align then install the motherboard cover back.
8.  Align then install the computer cover and computer stand.
Replacing the system fan
To remove the system fan:
1. Removing the computer stand. Refer to “Removing the computer 
stand”.
2.  Removing the computer cover. Refer to “Removing the computer  
cover”.
3.  Removing the motherboard cover. Refer to “Removing the 
motherboard cover”.
4.  Remove the heatsink. Refer to “Replacing the heatsink”.
5.  Disconnect the power cable from the motherboard.
6. Remove the 3 screws that secure the system fan to the chassis. 
						

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      43
7. Slide the system fan out and lift it up to remove it.
8. Align then install the new system fan.
9.  Align then install the heatsink & the motherboard cover back.
10.  Align then install the computer cover and computer stand.
Replacing the microprocessor
Important
Do not touch the gold contact on the bottom of the microprocessor. 
When handling the microprocessor, touch only the sides.
1.  Remove the computer stand. Refer to “Removing the computer stand”.
2.  Remove the computer cover. Refer to “Removing the computer cover”.
3.  Remove the motherboard cover. Refer to “Removing the motherboard 
cover”.
4.  Remove the heatsink. Refer to “Replacing the heatsink”.
5.  Lift the small handle and open the retainer. 
						

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6. Lift the microprocessor out of the retainer.
7. Align then place the new microprocessor back and lock the retainer 
properly with the handle.
8.  Align then install the heatsink and the motherboard cover.
9.  Install the computer cover and computer stand.
Replacing the function panel
1. Remove the computer stand. Refer to “Removing the computer stand”.
2.  Remove the computer cover. Refer to “Removing the computer cover”.
3.  Disconnect the cable from the function panel.
4. Remove the screw that secure the function panel to the chassis. 
						

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      45
5. Lift up the function panel.
6. Align then screw in the new function panel.
7.  Connect the cable to the new function panel.
8.  Install the computer cover and computer stand.
Replacing the WLAN card card
1. Remove the computer stand. Refer to “Removing the computer stand”.
2.  Remove the computer cover. Refer to “Removing the computer cover”.
3.  Remove the motherboard cover. Refer to “Removing the motherboard 
cover”.
4.  Disconnect the antenna cables from the WLAN card. 
						

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5. Remove the screw that secures the WLAN card to motherboard, and 
pull out the WLAN card.
 
6. Align then insert the new WLAN card to the card port and screw it in  
to the motherboard.
7.  Connect the antenna cables back to the new WLAN card.
8.  Install the motherboard cover back.
9.  Install the computer cover and computer stand.
Replacing the speakers system
1. Remove the computer stand. Refer to "Removing the computer stand".
2.  Remove the computer cover. Refer to "Removing the computer cover".
3.  Remove the motherboard cover. Refer to "Removing the motherboard 
cover".
4.  Disconnect the cables from the motherboard.
5.  Remove the 4 screws that secure the speakers system to the chassis. 
						

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      47
6. Lift up the speakers system.
7. Align then screw in the new speakers system.
8.  Connect the new speakers cables to the motherboard.
9.  Install the motherboard cover back.
10.  Install the computer cover and computer stand.
Removing the inverter board
To remove the inverter board
1. Remove the computer stand. Refer to "Removing the computer stand".
2.  Remove the computer cover. Refer to "Removing the computer cover".
3.  Remove the optical disk drive. Refer to "Replacing the optical disk 
drive".
4.  Remove  the 2 screws that secure the inverter cover to the chassis. 
						

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5. Lift up the inverter cover.
6. Disconnect all the cables from the inverter board.
7. Remove the 2 screws that secure the inverter board to the chassis.
8. Lift up the inverter board.