After the printer is running, confirm that the new CPU fan is mounted and plugged in correctly. You can check if it is rotating by using a small mirror or by carefully feeling it with your finger, as shown in the photo.

Tie up nearby cables to prevent them from moving and blocking the fan.

Caution: The power inlet and wires are located above the mainboard. Be sure to exercise caution and take necessary safety precautions to avoid the risk of electric shock.