Lenovo B305 Service Manual

							Chapter 8. Replacing hardware
      29
Replacing hardware
8
Attention 
Do not remove the computer cover or attempt any repair before 
reading the “Important safety information” in the Safety and Warranty 
Guide that was included with your computer or in the Hardware 
Maintenance Manual (HMM) for the computer. To obtain copies of 
the Safety and Warranty Guide or HMM, go to the Support Web site at: 
http://consumersupport.lenovo.com.Note
Use only parts provided by Lenovo.
General information
Pre-disassembly instructions
Before proceeding with the disassembly procedure, make sure that you 
do the following:
1.  Turn off the power to the system and all peripherals.
2.  Unplug all power and signal cables from the computer.
3.  Place the system on a flat, stable surface. 
						

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Removing the computer stand
Attention 
Turn off the computer and wait 3 to 5 minutes to let the computer 
cool down before removing the computer stand.
To remove the computer stand:
Note
For this procedure, it helps to place the computer face-down on a 
soft flat surface. Lenovo recommends that you use a blanket, towel, 
or other soft cloth to protect the screen surface from scratches or 
other damage.
1.  Remove any media (diskettes, CDs, or memory cards) from the drives, 
shut down the operating system, turn off all attached devices, and the 
computer. 
2.  Unplug all power cords from electrical outlets. 
3.  Disconnect all cables attached to the computer. This includes power 
cords, input/output (I/O) cables, and any other cables that are 
connected to the computer. Refer to “Locating connectors on the rear 
of the computer.” 
4.  Push the computer stand upward to the end 
, then slide the lock to 
the right side to lock the computer stand 
.
Note
Slide the lock to the left side to unlock the  computer stand when 
finish replacing a FRU. 
						

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      31
1
2
5. Remove the 2 screws that secure the computer stand to the chassis. 
6. Slide out the computer stand. 
4
3
3
Warning
When finish replacing a FRU, follow the below instructions to 
install back computer stand. Incorrect operations may damage the 
computer stand. 
						

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To reinstall the computer stand
1. Align then slide the computer stand back in and screw it back.
2. Push the stand upward as far as it will go.
3. Slide the lock to the left to unlock the computer stand.
1
2
3
Replacing a memory module
Attention
Turn off the computer and wait 3 to 5 minutes to let the computer 
cool down before removing the computer cover.  
Note
For this procedure, it helps to place the computer face-down on a 
soft flat surface. Lenovo recommends that you use a blanket, towel, 
or other soft cloth to protect the touch screen surface from scratches 
or other damage. 
						

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      33
To replace the memory module:
1. Remove any media (diskettes, CDs, or memory cards) from the drives, 
shut down the operating system, turn off all attached devices, and the 
computer. 
2.  Unplug all power cords from electrical outlets. 
3.  Disconnect all cables attached to the computer. This includes power 
cords, input/output (I/O) cables, and any other cables that are 
connected to the computer. Refer to “Locating connectors on the rear 
of the computer”. 
4.  Remove the rubber cap that protects the screw. 
5. Remove the screw that secures the memory cover to the computer 
cover. 
6. Lift up the memory cover. 
1
2
3 
						

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7. Push  out  the  latches  on  both  sides  of  the  memory  socket  to  release 
the  memory  module 
  and  gently  pull  the  memory  module  upward 
to remove it from its socket 
. Both memory modules can be removed 
by using the same procedure.
4
54
8.  Align then insert the new memory module into the socket and push 
down on the top edge of the memory module. Make sure the latches 
lock the memory module in place.
9.  Align then slide back the memory cover.
10.  Screw the memory cover back.
Replacing the optical disk drive 
Attention
Turn off the computer and wait 3 to 5 minutes to let the computer 
cool down before replacing the optical drive.  
						

							Chapter 8. Replacing hardware
      35
To replace the optical drive
Note
For this procedure, it helps to place the computer face-down on a 
soft flat surface. Lenovo recommends that you use a blanket, towel, 
or other soft cloth to protect the screen surface from scratches or 
other damage.
1.  Remove any media (diskettes, CDs, or memory cards) from the drives, 
shut down the operating system, turn off all attached devices, and the 
computer.
2.  Unplug all power cords from electrical outlets.
3.  Disconnect all cables attached to the computer. This includes power 
cords, input/output (I/O) cables, and any other cables that are 
connected to the computer. Refer to “Locating connectors on the rear 
of the computer”.
4.  Remove the rubber cap that protects the screw. 
5. Remove the screw that secures the optical drive to the chassis. 
6. Slide the optical drive out of the drive bay. 
1
2
3
7. Remove the 2 screws that secure the optical drive to the metal bracket. 
  
						

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8. Remove the optical drive cover. 
1
3
3
3
3
12
9. Install the new optical drive.
  (1) Connect the new optical drive to the cover.
  (2) Screw back the metal bracket to the new optical drive.
  (3) Slide the new optical drive into the drive bay.
10.  Screw the new optical drive back to the chassis.
Removing the computer cover
To remove the computer cover:
Note
For this procedure, it helps to place the computer face-down on a 
soft flat surface. Lenovo recommends that you use a blanket, towel, 
or other soft cloth to protect the screen surface from scratches or 
other damage.
1.  Remove any media (diskettes, CDs, or memory cards) from the drives, 
shut down the operating system, turn off all attached devices, and the 
computer.
2.  Unplug all power cords from electrical outlets. 
						

							Chapter 8. Replacing hardware
      37
3. Disconnect all cables attached to the computer. This includes power 
cords, input/output (I/O) cables, and any other cables that are 
connected to the computer. Refer to “Locating connectors on the rear 
of the computer”.
4.  Remove the computer stand. Refer to “Removing the computer stand”.
5.  Lift up the computer cover gently from the bottom right corner 
 to 
release the cover from the setscrews 
.
2
2
2
2
2
2
2
2
2
1
Replacing the hard disk drive
Attention
Turn off the computer and wait 3 to 5 minutes to let the computer 
cool down before replacing the hard disk drive.  
						

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To replace the hard disk drive:
Note
For this procedure, it helps to place the computer face-down on a 
soft flat surface. Lenovo recommends that you use a blanket, towel, 
or other soft cloth to protect the screen surface from scratches or 
other damage.
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 data and power cables from the hard disk drive. 
4. Remove the 4 screws that secure the hard disk drive to the chassis. 
2
2
2
2
1
5. Remove the 4 screws that secure the hard disk drive to the hard disk 
drive bay.