Lenovo B4400 Notebook - Manual (Page 52)

Lenovo B4400 Hardware Maintenance Manual
48
1100 System board
For access, remove these FRUs in order:
• “1010 Battery pack” on page 34
• “1020 Dummy card (Optional)” on page 35
• “1030 Hard disk drive(HDD)/Memory/Mini PCI Express Card slot
compartment cover” on page 36
• “1040 Hard disk drive” on page 37
• “1050 Optical drive” on page 40
• “1060 DDR3L SDRAM” on page 41
• “1070 Mini PCI Express Card for wireless LAN/WAN” on page 42
• “1080 Keyboard” on page 44
• “1090 Keyboard bezel” on page 46
Important notices for handling the system board:
When handling the system board, bear the following in mind.
• 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.
• In the whole process, make sure not to drop or stack the system board.
• If you put a system board down, make sure to put it only on a padded
surface such as an ESD mat or conductive corrugated material.