Lenovo B5400 Service Manual

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Lenovo B5400/M5400/M5400 Touch
1030 Backup battery
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34• “1020 Base cover” on page 35
Figure 3. Removal steps of backup battery
Detach the backup battery connector in the direction shown by arrow 1. Then 
remove the backup battery 2.

 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
1040 Optical drive
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34• “1020 Base cover” on page 35
Figure 4. Removal steps of optical drive
Remove the screw 1. Pull the optical drive out in the direction shown by  
arrow 2. 


StepScrew (quantity)ColorTorque
1M2 × 4 mm, flat-head, nylok-coated (1)ODD BKT to BASEBlack1.85+/-0.15 kgf*cm 

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Lenovo B5400/M5400/M5400 Touch
1050 Hard disk drive and solid state disk
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34• “1020 Base cover” on page 35
Attention: 
•	 Do	not	drop	 the	hard	 disk	drive	 or	apply	 any	physical	 shock	to	it.	 The	 hard	
disk	 drive	 is	sensitive	 to	physical	 shock.	Improper	 handling	can	cause	 damage	 and	
permanent	loss	of	data.
•	 Before	 removing	the	drive,	 suggest	 the	customer	 to	backup	 all	the	 information	 on	
it	if	possible.
•	 Never...

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Figure 5. Removal steps of hard disk drive and solid state disk (continued)
Remove the screws 4 and detach the metal frame from the hard disk drive. 




StepScrew (quantity)ColorTorque
4M3 × 4 mm, flat-head, nylok-coated (4)  HDD BRKT to HDDSliver3.0+/-0.3 kgf*cm
Remove the screw 5.

StepScrew (quantity)ColorTorque
5M2 × 3 mm, flat-head, nylok-coated (1)  SSD to MB Black1.85+/-0.15 kgf*cm 

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Lenovo B5400/M5400/M5400 Touch
Figure 5. Removal steps of hard disk drive and solid state disk (continued)
Remove the solid state disk from the slot in the direction shown by arro\
w 6.
 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
1060 PCI Express Mini Card for wireless LAN
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34• “1020 Base cover” on page 35
Figure 6. Removal steps of PCI Express Mini Card for wireless LAN
Disconnect the two wireless LAN cables (black, white) 1, and then remove the screw 2.


In step 1, unplug the jacks by using the removal tool antenna RF connector  
(P/N:  08K7159),  or  pick  up  the  connectors  with  your...

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Lenovo B5400/M5400/M5400 Touch
Figure 6. Removal steps of PCI Express Mini Card for wireless LAN (continued) 
Remove the card in the direction shown by arrow 3.

When installing:
When installing the wireless LAN card,  plug the black cable into the jack labeled AUX and the white cable into the jack labeled MAIN. 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
1070 DIMM
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34• “1020 Base cover” on page 35
Figure 7. Removal steps of DIMM 
Release the two latches on both edges of the socket at the same time in the direction shown by arrows 1, and then unplug the DIMM in the direction shown by arrow 2.


When installing: Insert the notched end of the DIMM into the socket. Push the DIMM firmly, and pivot it until it snaps into place....

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Lenovo B5400/M5400/M5400 Touch
1080 Keyboard
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34
• “1020 Base cover” on page 35
Figure 8. Removal steps of keyboard
Remove the screws 1.


StepScrew (quantity)ColorTorque
1M2 × 4 mm, flat-head, nylok-coated (2)  BASE to KBBlack1.85+/-0.15 kgf*cm 

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Figure 8. Removal steps of keyboard (continued) 
Loosen the keyboard with fingers in the direction shown by arrow 2. Lift the keyboard slightly 3. Detach the connectors in the direction shown by  arrows 4 and 5. Then remove the keyboard.




When installing: Make sure that the FPC connector is attached firmly.