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Edited by amy at 2020-12-5 10:52
It may also be that one knob is faulty, causing other knobs to fail to work.Please remove the cap of the knob to check.
If no problem is found, please disassemble the machine for inspection.
Please cut off the power before disassembling the machine. Take care to avoid touching the power board during the test.
Test whether some of the pins of all knobs are shorted to ground.
If there is a short-circuited pin, it may be that a certain knob is broken.
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Post time 2020-11-30 13:52:01