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Small Business Phone Systems / Troubleshooting / Cisco IP phone’s display is not backlit or illuminated

Cisco IP phone’s display is not backlit or illuminated

Publish Date: July 21, 2025
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.

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