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16. Unscrew the four screws around the fan.
17. Remove the faulty fan.
18. Install a new fan.
19. Replace the four screws.
20. To replace a sensor, remove the EVA and tinfoil.
21. Remove the sensor bracket.
22. Reverse the air duct board and remove
the bracket.
23. Remove the sensor.
24. Replace the sensor with a
new sensor.
DISASSEMBLY