P-660HN-51 User’s Guide
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CHAPTER 30
Troubleshooting
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
• Zyxel Device Access and Login
• Internet Access
30.1 Power, Hardware Connections, and LEDs
The Zyxel Device does not turn on. None of the LEDs turn on.
1 Make sure the Zyxel Device is turned on.
2 Make sure you are using the power adaptor or cord included with the Zyxel Device.
3 Make sure the power adaptor or cord is connected to the Zyxel Device and plugged in to an
appropriate power source. Make sure the power source is turned on.
4 Turn the Zyxel 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 1.6 on page 16.
2 Check the hardware connections.
3 Inspect your cables for damage. Contact the vendor to replace any damaged cables.
4 Turn the Zyxel Device off and on.
5 If the problem continues, contact the vendor.
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