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Justin DanielsAug 22, 2025
How to fix hpmont HD5L-PLUS Controller when there is no display when power up?
- YYolanda AllenAug 22, 2025
If there is no display when you power up the hpmont Controller, here are a few things to check: * First, verify the input power voltage. * Then, check the bus voltage to ensure the power supply of the drive board isn't faulty. * Also, make sure the wiring of the control board, drive board, and keypad is properly connected. Reconnect the keypad or check the wiring. If the rectifier bridge is damaged, contact the factory for repair. If the controller buffer resistance is damaged or the control board and keypad are faulty, further diagnosis is needed.
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