Lenovo ThinkPad X1 Carbon Hardware Maintenance Manual page 83

• 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 6,000 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 material.
For access, remove these FRUs in order:
• "1010 Keyboard bezel assembly" on page 61
• "1110 Thermal fan assembly" on page 72
• "1120 Audio and mini DisplayPort sub card" on page 74
• "1050 PCI Express Mini Card for wireless LAN" on page 66
• "1060 PCI Express Half Mini Card for wireless WAN" on page 67
The microprocess soldered on the top side of the system board is extremely sensitive. When you service the
system board, avoid any kind of rough handling.
a
Microprocessor
.
Chapter 9 Removing or replacing a FRU
77