Troubleshooting - Yealink EXP40 User Manual

This chapter provides general troubleshooting information to help you solve the
problems you might encounter when using your EXP40.
If you require additional information or assistance with your EXP40, contact your system
administrator.
Why does the EXP40 LCD screen prompts "Loading"?
Ensure that the Ext in/out jacks of the EXP40 are properly plugged using the supplied
connecting cord. For more information, refer to
Why is the EXP40 LCD screen blank?
Ensure that at least one EXP40 is properly plugged into a functional AC outlet if you

connect more than two
Ensure that the contrast of the LCD screen is in a comfortable level. For more

information about the contrast, refer to
Installation
.
expansion modules
Yealink SIP-T46G User Guide

Troubleshooting

on page 3.
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