Lenovo B5400 Service Manual

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Lenovo B5400/M5400/M5400 Touch
Figure 12. Removal steps of fan assembly and heat sink assembly (continued)


Lift the fan assembly and heat sink assembly in the direction shown by a\
rrow 3. Be careful not to damage the connector.

Attention: Do not handle the heat sink assembly roughly. Improper handling can cause distortion or deformation and imperfect contact with component\
s. 
						

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
1130 CPU
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34
• “1020 Base cover” on page 35
• “1040 Optical drive” on page 38
• “1050 Hard disk drive and solid state disk” on page 39
• “1060 PCI Express Mini Card for wireless LAN” on page 42
• “1080 Keyboard” on page 45
• “1090 Keyboard bezel” on page 47
• “1100 USB board and function board” on page 51
• “1110 System board” on page 53
• “1120 Fan assembly and heat sink assembly” on page 56
Attention: CPU is extremely sensitive. When you service the CPU, avoid any kind of rough handling.
Figure 13. Removal steps of CPU
Rotate the head of the screw in the direction shown by arrow 1 to release the lock, then remove the CPU in the direction shown by arrow 2.

C
D

When installing: Place the CPU on the CPU socket in the direction shown by arrow a, and then rotate the head of the screw in the direction shown by  arrow b to secure the CPU. 
						

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Lenovo B5400/M5400/M5400 Touch
1140 LCD unit
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Base cover” on page 35
• “1030 Backup battery” on page 37
• “1040 Optical drive” on page 38
• “1050 Hard disk drive and solid state disk” on page 39
• “1060 PCI Express Mini Card for wireless LAN” on page 42
• “1080 Keyboard” on page 45
• “1090 Keyboard bezel” on page 47
• “1100 USB board and function board” on page 51
• “1110 System board” on page 53
Figure 14. Removal steps of LCD unit
Release the antenna cables from the cable guides and then remove the scr\
ews 1.




StepScrew (quantity)ColorTorque
1M2.5 × 5 mm, flat-head, nylok-coated (6) Hinge to BASE Black4.0+/-0.3 kgf*cm 
						

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Figure 14. Removal steps of LCD unit (continued)
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 that you do not pinch the antenna cables when you attach the LCD assembly. Route the LCD cable along the cable guides.
Remove the LCD unit in the direction shown by arrow 2.
 
						

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Lenovo B5400/M5400/M5400 Touch
1150 LCD front bezel (B5400/M5400)
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Base cover” on page 35
• “1040 Optical drive” on page 38
• “1050 Hard disk drive and solid state disk” on page 39
• “1060 PCI Express Mini Card for wireless LAN” on page 42
• “1080 Keyboard” on page 45
• “1090 Keyboard bezel” on page 47
• “1100 USB board and function board” on page 51
• “1110 System board” on page 53
• “1140 LCD unit” on page 59
Figure 15. Removal steps of LCD front bezel (B5400/M5400)
Remove LCD bezel screw pads 1 and the screws 2.
B5400



 
						

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Figure 15. Removal steps of LCD front bezel (B5400/M5400) (continued)
M5400



StepScrew (quantity)ColorTorque
2M2.5 × 5 mm, flat-head, nylok-coated (2) (B5400) LCD Bezel to LCD Cover (BM6)Black3.0+/-0.3 kgf*cm
2M2.5 × 3 mm, flat-head, nylok-coated (2) (M5400) LCD Bezel to LCD Cover (BM5)Black3.0+/-0.3 kgf*cm
Remove the LCD front bezel in the direction shown by arrows 3.



 
						

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Lenovo B5400/M5400/M5400 Touch
1160 LCD panel, LCD cable, antenna assembly, and hinges 
(B5400/M5400)
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Base cover” on page 35
• “1030 Backup battery” on page 37
• “1040 Optical drive” on page 38
• “1050 Hard disk drive and solid state disk” on page 39
• “1060 PCI Express Mini Card for wireless LAN” on page 42
• “1070 DIMM” on page 44
• “1080 Keyboard” on page 45
• “1090 Keyboard bezel” on page 47
• “1100 USB board and function board” on page 51
• “1110 System board” on page 53
• “1140 LCD unit” on page 59
• “1150 LCD front bezel (B5400/M5400)” on page 61
Figure 16. Removal steps of LCD panel, LCD cable, antenna assembly, and hinges (B5400/M5400)
Remove the screws 1. Lift the LCD panel in the direction shown by arrow 2.
B5400




 
						

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
Figure 16. Removal steps of LCD panel, LCD cable, antenna assembly, and hinges (B5400/M5400) (continued)
M5400





StepScrew (quantity)ColorTorque
1M2.5 × 3 mm, flat-head, nylok-coated (4) (B5400) Hinge to LCD Cover (for BM6)Black4.0+/-0.3 kgf*cm
1M2 × 3 mm, flat-head, nylok-coated (4) (M5400) Panel to LCD Cover (for BM5) Black1.85+/-0.15 kgf*cm
Remove the screws 3. Then release the hinges in the direction shown by arrows 4.
B5400





 
						

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Lenovo B5400/M5400/M5400 Touch
Figure 16. Removal steps of LCD panel, LCD cable, antenna assembly, and hinges (B5400/M5400) (continued)
M5400




StepScrew (quantity)ColorTorque
3M2 × 3 mm, flat-head, nylok-coated (4) (B5400) Hinge to Panel (for BM6)Black1.85+/-0.15 kgf*cm
3M2.5 × 3 mm, flat-head, nylok-coated (6) (M5400) Hinge to LCD Cover (for BM5) Black4.0+/-0.3 kgf*cm
Peel off the adhesive tape and detach the connector in the direction shown by arrow 5. Then remove the LCD cable.

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

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Lenovo B5400/M5400/M5400 Touch Hardware Maintenance Manual
1170 LCD module, LCD cable, and hinges (M5400 Touch)
For access, remove these FRUs in order: 
• “1010 Battery pack” on page 34
• “1020 Base cover” on page 35
• “1030 Backup battery” on page 37
• “1040 Optical drive” on page 38
• “1050 Hard disk drive and solid state disk” on page 39
• “1060 PCI Express Mini Card for wireless LAN” on page 42
• “1070 DIMM” on page 44
• “1080 Keyboard” on page 45
• “1090 Keyboard bezel” on page 47
• “1100 USB board and function board” on page 51
• “1110 System board” on page 53
• “1140 LCD unit” on page 59
Figure 17. Removal steps of LCD module, LCD cable, and hinges  (M5400 Touch)
Remove LCD bezel screw pads 1 and the screws 2. Then remove the LCD module 3.
1
2
1
2
1
2
1
2
3
StepScrew (quantity)ColorTorque
2M2.5 × 5 mm, flat-head, nylok-coated (4)   LCD Module W/LCD BezelBlack3.0+/-0.3 kgf*cm