Viewing Device Status; Resetting Your Device; Troubleshooting; Why Is The Screen Blank - Yealink Teams T55A User Manual

Viewing Device Status

Your system administrator may ask you to view the device status such as network, MAC, firmware, Partner
APP version, Company Portal version, and Teams version.
Procedure
Go to > Settings > Device Settings > About.

Resetting Your Device

You can reset the device to factory settings with the need for entering the Administrator's password.
Procedure
1. Go to
(More) > Settings > Device Settings > Debug (Admin only, default password: 0000).
2. Tap Reset to Factory Settings.
It prompts if you are sure to reset to factory default.
3. Tap OK.
Tip: You can also long press the pound key (#) and the star key ( * ) for about 6 seconds when
the phone is idle.

Troubleshooting

If you are having issues with your device, you can try the troubleshooting options and solutions in the
following topics to resolve certain issues.
•

Why is the screen blank?

•

Why does the device display "Network unavailable"?

• Why does the device display time and date incorrectly?
• How can I obtain the MAC address of a device when the device is not powered on?
• Why can't I receive calls?
• Why doesn't my handset work?
• Checking the IP Address of Device
Why is the screen blank?
• If the device is powered from PoE, ensure you use a PoE-compliant switch or hub.
• Ensure that the device is properly plugged into a functional AC outlet.
Why does the device display "Network unavailable"?
• Ensure that the Ethernet cable is plugged into the Internet port on the phone and the Ethernet cable is
not loose.
• Ensure that the switch or hub in your network is operational.
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