Install Heatsink
Before proceeding with the upgrade
Please read the whole guide in order to have a good understanding of how all the components fit together.
You need to be careful not to tear or damange some of the cables when handling the casing of the device.
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Step-by-Step GuideStep 1: Open up the bag with the heatsink and the accessories.

Step 2: Find the 4 metal screws and the 4 spacers.

Step 3: Apply the thermal tape to the Ethernet IC and the CPU as show on the image.

Step 4: Fix the heatsink on the thermal tape and fasten it using the metal screw. Remember to use the spacer between the screw and the heatsink.

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DisscussionYou have now successfully installed a heatsink onto your [AutoPi](https://www.autopi.io) [TMU CM4](https://www.autopi.io/hardware/autopi-tmu-cm4) device.
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In case you have any questions, don't hesitate to contact us at support@autopi.io.