1190 System Board - Lenovo ThinkPad L590 Hardware Maintenance Manual

1190 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 material.
For access, remove these FRUs in order:
• "Removing the nano-SIM card and nano-SIM-card tray" on page 66
• "Removing the microSD card" on page 66
• "1010 Keyboard" on page 67
Note: The keyboard removal tool (product part number: 01LX856) is needed for removing the keyboard.
You can purchase it as a separate FRU at:
• "1020 Base cover assembly" on page 70
• "1030 Wireless-LAN card" on page 72
• "1040 Wireless-WAN card" on page 73
• "1050 Memory module" on page 73
• "1060 I/O bracket" on page 74
• "1080 USB and audio card bracket (for L590)" on page 82
• "1090 USB and audio card" on page 82
• "1110 Thermal fan assembly" on page 85
• "1120 Built-in battery" on page 87
Attention: The components on the system board are extremely sensitive. When you service the system
board, avoid any kind of rough handling.
https://support.lenovo.com/partslookup .
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Chapter 8 Removing or replacing a FRU
105