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Blank Phone Screen in Yealink T23 IP Phone

Is your Yealink SIP-T23P or SIP-T23G phone LCD display blank and there is no dial tone? Learn how to resolve the issue by switching to a reliable power source.


Your Yealink SIP-T23P or SIP-T23G phone LCD display is blank (shows no time, lines, or messages). There is no dial tone, and you are unable to make or receive calls.

Applies To

Yealink SIP-T23P & SIP-T23G


Ensure a reliable power source.

  • Ensure that the phone is properly plugged into a functional AC outlet.
  • If the phone is plugged into a socket controlled by a switch, ensure that the switch is on.
  • If the phone is plugged into a power strip, try plugging it directly into a wall outlet instead.
  • If your SIP-T23P/T23G IP phone is powered from PoE, ensure you use a PoE-compliant switch or hub.


It is likely your phone is not drawing power, either from an electrical outlet or a power-over-ethernet (PoE) source.

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