¶ 1.Tools：
- S2.5 Allen key
- Phillips screwdriver
- Multimeter
¶ 2.Check the hotbed wiring:
¶ Step 1: Turn off the printer
Before checking the wiring, turn off the printer and disconnect the power supply to ensure safe operation.
¶ Step 2: Remove the printer base plate
Use an S2.5 Allen wrench to unscrew the two screws holding the base plate. Remove the cooling fan cable and remove the bottom plate.
¶ Step 3: Check the the heated bed cable.
(1) Gently tug on the heated bed cable to inspect whether it's loose or detached.
(2) If the cable is loose or detached, use a Phillips screwdriver to loosen the screws that secure the heated bed cable, then reattach and tighten the heated bed cable.
¶ 3.Measure the mainboard voltage:
¶ Step 1: Heat up the heated bed
First, heat the heated bed to 50 degrees. During the heating process, if the mainboard blue indicator light is on, it indicates that the heated bed is heating up normally. If it is flashing, it means the heated bed heating is complete. If it is not on, it indicates an abnormality in the heated bed heating, and voltage measurement is required.
