E20
Jaguar
HMI / Display Communication Failure
Charger shows E20; app may say ‘Display error’ or the screen is blank with backlight only.
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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
Loose ribbon cable between display and main PCB, Failed LCD/OLED display module, HMI firmware mismatch, Damaged HMI driver on PCB
How to Fix / Troubleshooting
Safety first: Isolate power before removing the front panel.
- Step 1 – Power cycle: Turn off the charger for 2 minutes, then restore power. Observe if the display initializes.
- Step 2 – Reseat display cable: With power OFF, remove the front cover and carefully reseat the ribbon or connector between the display and the main PCB.
- Step 3 – Inspect for damage: Check the display board for cracks, moisture, or burnt components.
- Step 4 – Replace display module: If connections are good but the display remains faulty, replace the Jaguar HMI/display module.
- Step 5 – PCB driver check: If a new display does not resolve the issue, the HMI driver on the main PCB may be defective and require PCB replacement.
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Repair Difficulty
Medium
3/5
Required Part
Jaguar Wallbox Display / HMI Module
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