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Q : How to solve the problem that no display when the VFD is powered on?
A: If the DC power indicator is on, the possible causes are: the keypad is damaged or the keypad cable is not in good contact, so the keypad and keypad cable can be replaced for testing; if the power board is damaged, replace the power board; if the main control board is damaged, replace the main control board; if the DC power supply is not enough, that means the input power supply may not be connected; or the rectifier is damaged; or the fuse is damaged.
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