Before disassembly, please lower the hotbed to the bottom, then turn off the printer and disconnect the power supply to ensure safe operation.
(1) The light bar of the printer is in the position indicated by the arrow below, please put the printer flat first.
(2) Then use the S2.0 Allen key to unscrew the two screws fixing the light bar.
Remove the cable from the light bar and remove the light bar.
Replace the light bar with a new one, and then connect the light bar cable back to the light bar.
Please align the light bar with the hole and tighten the two screws holding the light bar using an S2.0 Allen key.