1. Follow the steps in Removing the Top Case.
2. Follow the steps in Removing the CPU Cooler Shroud.
3. Follow the steps in Removing the GPU (if applicable).
4. Gently but firmly separate the Cooling Fan from the Heat Sink (fig. 33). The fan is held
on by clips which can be pried from the sides of the heatsink.
5. Next, disconnect the power cables from the Cooling Fan.
6. Remove the four (4) bracket screws fastening the Heat Sink to the board. Loosen the
screws one at a time and moving from opposite corner to opposite corner across the
Heat Sink. For example: first, top left screw, then bottom right screw (fig. 34). This
ensures even pressure between the brackets and the motherboard.
7. Lift the Heat Sink off of the motherboard.
8. You’ll notice that there is Thermal Paste coating the bottom of the Heat Sink as well as
the CPU core.
9. Apply Rubbing Alcohol to a sheet of Paper Towel and wipe the Thermal Paste off of the
bottom of the Heat Sink and CPU core until they are totally clean.
10. If you are replacing the Thermal Paste, continue on to the section Replacing the CPU
Thermal Paste (See Important NOTE below).
11. Replace the Heat Sink over the CPU core.
12. Re-fasten the Heat Sink screws, again using the opposite corner method described
above.
13. Follow the steps to Replace the GPU (if applicable).
14. Follow the steps to Replace the CPU Cooler Shroud.
15. Follow the steps to Replace the Top Case.
NOTE: DO NOT use your Thelio without thermal paste. Steps 11-12 above are there simply
to help you reassemble your machine if you are not yet ready to apply new Thermal Paste.
Running the machine without Thermal Paste could result in overheating, system shutdowns and
possibly damage to the internal components.
System76 Thelio (thelio-b1)
31
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