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Check whether the heating element switch has poor contact, whether the line is connected and loose, and whether there is a problem with the heating element.
Just measure whether the power supply line of the lamp is 220V. >>>More
Summary. Hello dear. Turn off the power switch, check whether the LED tube is black and dark, if so, it may be that the LED has been broken, you can replace it with a new one, if not, take a look at the interface, tighten the switch by hand and try, the problem solving instructions are that the interface is loose and the contact is poor. >>>More
In this case, it is possible that the light bulb is old.
Get a new light bulb! >>>More
The lights are black and broken.
If the motor of the fan is damaged, or the starting capacitor is damaged, see a professional.