HJM Support
Troubleshooting
Choose the symptom: display errors, charging, battery readings, lights or brake noise. Match your exact model and component version before using a guide.
Display & error codes
Display Error Codes — PDF Guide
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Battery & charging
Why Does the Battery Percentage Change? — PDF Guide
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Charger Light Stays Red — PDF Guide
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Lights
Headlight Not Working — PDF Guide
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Brakes
Brake Noise — Troubleshooting Guide
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