Turn off the grow box and disconnect the power cord.
Remove the 8 screws as shown in the diagram and open the back cover of the device.
Take a photo to document the position of the wiring harness to ensure accurate reinstallation later.
Use a Phillips screwdriver to remove the 5 screws securing the wiring harness and the 2 screws securing the power supply.
Carefully remove the power supply and replace it with a new one. Then, using the photo as a guide, correctly reconnect the wiring harness to the power supply connectors in the original order.
After reassembling the device, plug in the power cord and turn on the device. It should now be ready for use.
