Jaguar Unstable Low-Voltage Supply / HMI Power Issue

Charger’s front LEDs or display backlight flicker or dim randomly during operation.

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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.

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Possible Causes

Failing DC power supply on PCB, Loose low-voltage connector to display, Intermittent short on HMI board, Overloaded auxiliary output powering accessories (e.g., Wi‑Fi module)

How to Fix / Troubleshooting

Safety first: Flickering may indicate impending power supply failure; isolate power before internal inspection.

  • Step 1 – Check mains stability: Verify that the supply voltage is stable and not sagging under load.
  • Step 2 – Inspect connectors: With power OFF, reseat all low-voltage connectors between the main PCB, display, and communication modules.
  • Step 3 – Remove add-ons: Temporarily disconnect any optional accessories (e.g., external Wi‑Fi bridge) to reduce load on the auxiliary supply.
  • Step 4 – Replace power module: If flicker persists, the low-voltage power supply section of the Jaguar PCB may need replacement.
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Repair Difficulty

Medium 3/5

Required Part

Jaguar Wallbox HMI Power / Low-Voltage Supply
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