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Small Business Resources / Troubleshooting

Yealink IP phone’s display is not backlit or illuminated

Last Updated: July 21, 2025

The most likely cause of your phone’s display not being illuminated is that it is not connected to an AC power supply. Make sure the phone is connected to AC power.

If the phone is plugged in, follow the instructions in the user manual to make sure the phone’s backlight is turned on.

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