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Erica MitchellSep 23, 2025
What to do if Keyboard without display after power on SAJ Controller?
- AAnthony MorseSep 23, 2025
To solve the keyboard without display after power on problem: * Use a multimeter to measure the input voltage of the controller; check the voltage is normal. * Check if the machine has a burning smell; if there is a burning smell, please contact the agent to replace the controller.



