Lenovo B490 Laptop Hardware Maintenance Manual - ThinkPad B490 - Page 72

LCD unit

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Page 72 highlights

• "1100 Keyboard bezel" on page 54 • "1130 Microphone assembly" on page 58 • "1150 System board assembly and USB board" on page 60 • "1160 Thermal module" on page 62 Attention: The microprocessor is extremely sensitive. When you service the microprocessor, avoid any kind of rough handling. Removal steps of microprocessor Rotate the head of the screw in the direction shown by the arrow 1 to release the lock, then remove the microprocessor 2 . 1 b a 2 When installing: Place the microprocessor above the microprocessor socket a , and then rotate the head of the screw in the direction shown by the arrow b to secure the microprocessor. 1180 LCD unit For access, remove these FRUs in order: • "1010 Battery pack" on page 44 • "1020 Bottom slot cover" on page 44 • "1030 Optical drive" on page 45 • "1040 Memory modules" on page 46 • "1050 Hard disk drive assembly" on page 47 • "1060 PCI Express Mini Card for wireless LAN" on page 49 • "1070 mSATA solid-state drive" on page 50 • "1080 Backup battery" on page 51 • "1090 Keyboard" on page 51 • "1100 Keyboard bezel" on page 54 66 Hardware Maintenance Manual

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•
“1100 Keyboard bezel” on page 54
•
“1130 Microphone assembly” on page 58
•
“1150 System board assembly and USB board” on page 60
•
“1160 Thermal module” on page 62
Attention:
The microprocessor is extremely sensitive. When you service the microprocessor, avoid any
kind of rough handling.
Removal steps of microprocessor
Rotate the head of the screw in the direction shown by the arrow
1
to release the lock, then remove the
microprocessor
2
.
2
a
b
1
When installing:
Place the microprocessor above the microprocessor socket
a
, and then rotate the head of
the screw in the direction shown by the arrow
b
to secure the microprocessor.
1180 LCD unit
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 44
•
“1020 Bottom slot cover” on page 44
•
“1030 Optical drive” on page 45
•
“1040 Memory modules” on page 46
•
“1050 Hard disk drive assembly” on page 47
•
“1060 PCI Express Mini Card for wireless LAN” on page 49
•
“1070 mSATA solid-state drive” on page 50
•
“1080 Backup battery” on page 51
•
“1090 Keyboard” on page 51
•
“1100 Keyboard bezel” on page 54
66
Hardware Maintenance Manual