Lenovo 244723U Laptop User Manual


 
“1070 Memory module (upper slot)” on page 77
“1080 PCI Express Mini Card for wireless LAN” on page 78
“1090 PCI Express Mini Card for wireless WAN or mSATA solid state drive” on page 80
“1100 ExpressCard blank bezel or ExpressCard” on page 84
“1120 Bluetooth daughter card” on page 88
“1130 Backup battery” on page 89
“1140 Smart card, dummy smart card and spacer” on page 90
“1150 Speaker assembly” on page 91
“1160 Thermal fan assembly” on page 92
“1170 Microprocessor” on page 95
“1180 LCD unit” on page 96
“1190 Base cover assembly” on page 99
“1200 I/O sub card” on page 101
Important notices for RAID setting:
Before you replace the system board, ensure that you have read Chapter 5 “Installing and conguring RAID”
on page 47
, and have obtained the necessary information. After you replace the system board, RAID mode
is recovered to default. To verify the RAID mode setting, check the ThinkPad Setup setting by selecting
Cong Serial ATA (SATA) SATA Controller Mode Option RAID/Compatibility/AHCI. Then, you
will see that the RAID option is enabled.
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 at 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 conductive
corrugated material.
Location of major sensitive components on the 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
Microprocessor
b
Platform Controller Hub (PCH)
c
Accelerometer chip for the hard disk drive Active Protection System
d
Graphics chip
Note: The graphics chip
d is only for the switchable graphics models and workstation models.
The system board in integrated graphics models does not have this chip.
For Integrated Graphics models:
Chapter 10. Removing or replacing a FRU 103