Lenovo 10140/90AC, Руководство по обслуживанию

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Step 11. Reattach the computer cover.
Replacing the heat-sink & fan assembly
Note: For this procedure, it helps to lay the computer flat.
To replace the heat-sink and fan assembly:
Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, and turn off the computer and all attached devices.
Step 2. Unplug all power cords from electrical outlets.
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)
cables, and any other cables that are connected to the computer. Refer to “Left and right view”
and “Rear view” for help with locating the various connectors.
Step 4. Remove the computer cover. Refer to “Removing the computer cover”.
Step 5. Disconnect the microprocessor fan cable from the system board.
Step 6. Remove the four screws that secure the heat-sink assembly to the motherboard and chassis. 1
Step 7. Remove the heat-sink assembly as shown. 2
Step 8. To install the new heat-sink and fan assembly:
a. Use a thermal grease syringe to place five drops of grease on the top of the microprocessor.
Each drop of grease should be 0.03ml (3 tick marks on the grease syringe).
b. Line up the screws on the new heat-sink with mounting holes on the motherboard, then
secure it with the four screws.
c. Reconnect the microprocessor fan power cable to the connector on the motherboard.
Step 9. Reattach the computer cover.
Chapter 8
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Replacing hardware
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