Flip the device over.

Take care when flipping the chassis over because the fan is now loose.

Use your fingers to pull and disconnect the fan connector from its motherboard socket.

Take care not to pull on the wires when disconnecting the fan to prevent breaking the connector.

This connector may be difficult to remove. A good method to remove it is to shimmy the connector up and out of its socket with a spudger.

You may be able to remove this connector without removing the power supply with a pair of needle-nose pliers.