Lenovo 5248 User Manual
Page 49
This section provides instructions on how to replace the microprocessor fan assembly.
To replace the microprocessor fan assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 14.
4. Remove the frame stand or lift stand. See “Removing or reinstalling the frame stand” on page 14 or
“Removing or reinstalling the lift stand” on page 15.
5. Remove the rear I/O assembly cover. See “Removing or reinstalling the rear I/O assembly cover”
6. Remove the VESA frame cover. See “Removing or reinstalling the VESA frame cover” on page 18.
7. Note the routing of the microprocessor fan assembly cable and then disconnect the microprocessor fan
assembly cable from the system board.
8. Remove the three screws
1
that secure the microprocessor fan assembly and then lift the
microprocessor fan assembly off the system board.
Figure 33. Removing the microprocessor fan assembly
9. Position the new microprocessor fan assembly on the system board and align the three screw holes in
the new microprocessor fan assembly with those in the system board.
10. Install the three screws to secure the microprocessor fan assembly to the system board.
11. Connect the microprocessor fan assembly cable to the system board. See “System board part and
connector locations” on page 12.
12. Reinstall the VESA frame cover and the rear I/O assembly cover.
Chapter 2
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Installing or replacing hardware
41