Lenovo B430 Notebook - Manual (Page 83)

1140 System board assembly
Important notices for handling the system board:
When handling the system board, bear the following in mind:
• The system board has an accelerometer, which can be broken if 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.
• If a system board is dropped, be sure to document the drop in any reject report, and replace the system board.
• 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 Battery pack” on page 58
• “1020 Large bottom cover” on page 59
• “1030 Small bottom cover” on page 60
• “1040 Optical drive or blank bezel” on page 60
• “1050 Memory modules” on page 61
• “1060 Hard disk drive assembly” on page 62
• “1070 PCI Express Mini Card for wireless LAN” on page 64
• “1080 Backup battery” on page 65
• “1090 Thermal fan” on page 66
• “1100 Thermal pipes” on page 67
• “1110 Keyboard” on page 69
• “1120 Keyboard bezel assembly, card reader, touch pad, and dummy cap” on page 72
• “1130 CPU” on page 76
Removal steps of system board
Attention: The following components soldered on the top side of the system board are extremely sensitive.
When you service the system board, avoid any kind of rough handling.
a CPU
b Platform Controller Hub (PCH)
c Graphics Processing Unit (GPU) (discrete graphics card)
Chapter 9 . Removing or replacing a FRU 77