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1140 System board
Important notices for handling the system board:
When handling the system board, read the following:
• Some components mounted on a system board are very sensitive. Improper handling of a system board can cause
damage to those components, and may cause a system malfunction.
• 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.
• Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array) chipset.
For access, remove these FRUs in order:
• "1010 Base cover assembly" on page 37
• "1020 M.2 2242 solid-state drive" on page 38
• "1030 Wireless WAN card (for selected models)" on page 39
• "1040 Coin-cell battery" on page 40
• "1050 Memory module" on page 40
• "1060 Wireless LAN card" on page 41
• "1070 Heat sink" on page 42
• "1080 Rear camera and microphone module, bracket, and cable (for selected models)" on page 43
• "1090 Thermal fan" on page 44
• "1100 Built-in battery" on page 45
• "1110 P-sensor cable (for selected models)" on page 46
• "1130 I/O brackets" on page 48
Removal steps of the system board
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Chapter 5
Removing or replacing a FRU
49
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