Slide the battery back in so it plugs into the connector on the motherboard and secure the screws.

Replace the back panel and press it down gently around the edges to ensure the clips attach properly.

Use the Phillips #0 screwdriver to secure the six 3.2 mm screws.

Power on the laptop and listen for the fan running properly. Check system temperatures using software like HWMonitor or Core Temp to confirm that the cooling fan is working effectively.