1150 system board assembly – Lenovo M4400s notebook User Manual

Page 65

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1150 System board assembly

For access, remove these FRUs in order:

“1010 Battery pack” on page 42

“1020 Bottom slot cover” on page 42

“1030 Memory modules” on page 43

“1040 Hard disk drive assembly” on page 45

“1050 PCI Express Mini Card for wireless LAN” on page 46

“1060 mSATA solid-state drive” on page 47

“1070 Backup battery” on page 48

“1080 Base cover” on page 49

“1110 Fingerprint board bracket and fingerprint board” on page 52

“1120 Thermal module assembly” on page 54

Important notice for replacing the system board

When replacing the system board, observe the following guidelines:

• Do not drop a system board on a bench top that has a hard surface, such as metal, wood, or composite.

• Do not apply any excessive force to a system board.

• Avoid rough handling of any kind.

• Avoid bending a system board or hard pushing to prevent cracking at each Ball Grid Array (BGA) chipset.

• When 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.

Locating major sensitive components on the system board

Attention: The following components mounted on a system board are extremely sensitive. Improper
handling of a system board can cause damage to the following components, and might cause a system
malfunction. When you service the system board, avoid any kind of rough handling.

a

Platform Controller Hub (PCH)

b

Microprocessor

c

Graphics chip (for discrete graphics models)

For models with an integrated thermal module assembly

a

b

Chapter 8

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Removing or replacing a FRU

59

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