Step Screw (quantity) Color
Torque
2
M2 × 3 mm, flat-head, nylon-coated (1)
Black 0.196 Nm
(2 kgf-cm)
1150 System board
Important notices for handling the system board:
When handling the system board, read the following:
• The system board has an accelerometer, which can be broken when several thousands of G-forces are applied.
Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench can subject
the accelerometer to as much as 6000 G's of shock.
• Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or
composite.
• Avoid rough handling of any kind.
• At every point in the process, be sure not to drop or stack the system board.
• If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated
conductive surface.
For access, remove these FRUs in order:
• “1010 Bottom cover” on page 64
• “1020 Battery” on page 65
• “1030 Hard disk drive assembly, solid-state drive assembly, hard disk drive cable, or solid-state drive
cable” on page 65
• “1040 M.2 solid-state drive and M.2 solid-state drive bracket” on page 67
• “1050 Keyboard” on page 68
• “1060 Base cover assembly” on page 70
• “1070 Memory module” on page 71
• “1080 Wireless LAN card” on page 73
• “1090 Coin-cell battery and Ethernet bracket” on page 74
• “1100 Media-card-reader card, the media-card-reader card bracket, and the media-card-reader card
cable” on page 75
• “1110 ThinkPad LED card” on page 77
• “1120 Thermal fan and the PCH bracket” on page 79
84
Hardware Maintenance Manual
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