Charger shows E17; may be accompanied by flickering display or unexpected restarts.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Failed low-voltage power supply module on main control board, Shorted component on display/control PCB, Surge damage from lightning or grid spikes, Loose internal power harness connector

How to Fix / Troubleshooting

Safety: Internal power supply circuits are connected to mains. Do not open the unit.

Disconnect and wait: Unplug the J+ Booster for 10 minutes to allow internal capacitors to discharge, then reconnect.
Check supply stability: Avoid outlets with frequent flickering or known power issues. Use a surge-protected circuit if possible.
Observe behavior: If the display continues to flicker or the unit restarts randomly, stop using the charger.
Professional repair: The internal power supply section of the main control board or the display PCB likely needs replacement.

Repair Difficulty

Professional Required 5/5

Required Part

J+ Booster Main Control Board

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