Replacing The Thermal Sensor - Lenovo ThinkStation 2551 Hardware Maintenance Manual

7. Install the new system fan by aligning the new rubber mounts that came with the new system fan with the
corresponding holes in the chassis, and then push the rubber mounts through the holes. Then, carefully
pull on the tips of the rubber mounts from the bottom until the new system fan is secured in place.
Figure 97. Installing the system fan
8. Connect the new system fan cable to the system fan connector on the system board. See "Locating
parts on the system board" on page 84.
9. Reinstall the hard disk drive. See "Replacing the hard disk drive" on page 137.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to "Completing the parts replacement" on page 167.

Replacing the thermal sensor

Attention:
Do not open your computer or attempt any repair before reading and understanding "Important Safety Information"
on page 1.
This section provides instructions on how to replace the thermal sensor.
To replace the thermal sensor, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Open the computer cover. See "Opening the computer cover" on page 122.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 122.
4. Locate the thermal sensor. See "Locating major FRUs and CRUs" on page 81.
5. Disconnect the thermal sensor cable from the thermal sensor connector on the system board. See
"Locating parts on the system board" on page 84.
6. Remove the cover presence switch (intrusion switch). See "Replacing the cover presence switch" on
page 153.
7. Remove the internal speaker. See "Replacing the internal speaker" on page 155.
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ThinkStation Hardware Maintenance Manual