ZyXEL LTE5121 User Guide - Page 217
Troubleshooting
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CHAPTER 28 Troubleshooting 28.1 Overview This chapter offers some suggestions to solve problems you might encounter. The potential problems are divided into the following categories. • Power, Hardware Connections, and LEDs • LTE Device Access and Login • Internet Access • Wireless Internet Access • Phone Calls and VoIP • USB Device Connection • UPnP 28.2 Power, Hardware Connections, and LEDs The LTE Device does not turn on. None of the LEDs turn on. 1 Make sure the LTE Device is turned on. 2 Make sure you are using the power adaptor or cord included with the LTE Device. 3 Make sure the power adaptor or cord is connected to the LTE Device and plugged in to an appropriate power source. Make sure the power source is turned on. 4 Turn the LTE Device off and on. 5 If the problem continues, contact the vendor. One of the LEDs does not behave as expected. 1 Make sure you understand the normal behavior of the LED. See Section 1.7 on page 17. 2 Check the hardware connections. See the Quick Start Guide. LTE-5121 User's Guide 217