ZyXEL Communications B-420 User Manual
ZyAIR B-420 Wireless LAN Ethernet Adapter and Bridge
Troubleshooting A-1
Appendix A
Troubleshooting
This appendix covers potential problems and possible remedies. After each problem description,
some instructions are provided to help you to diagnose and to solve the problem.
Problems Starting Up the ZyAIR
Chart A-1 Troubleshooting the Start-Up of Your ZyAIR
PROBLEM
CORRECTIVE ACTION
None of the LEDs
turn on when I
plug in the power
adaptor.
turn on when I
plug in the power
adaptor.
Make sure you are using the supplied power adaptor and that it is plugged in to an
appropriate power source. Check that the power source is turned on.
appropriate power source. Check that the power source is turned on.
If the problem persists, you may have a hardware problem. In this case, you should
contact your local vendor.
contact your local vendor.
The ZyAIR
reboots
automatically
sometimes.
reboots
automatically
sometimes.
The supplied power to the ZyAIR is too low. Check that the ZyAIR is receiving
enough power.
enough power.
Make sure the power source is working properly.
Problems with the Password
Chart A-2 Troubleshooting the Password
PROBLEM CORRECTIVE
ACTION
I cannot access
the ZyAIR.
the ZyAIR.
The Password and Username fields are case-sensitive. Make sure that you enter
the correct password and username using the proper casing.
the correct password and username using the proper casing.
Use the RESET button on the top panel of the ZyAIR to restore the factory default
configuration file (hold this button in for about 10 seconds or until the link LED turns
red). This will restore all of the factory defaults including the password.
configuration file (hold this button in for about 10 seconds or until the link LED turns
red). This will restore all of the factory defaults including the password.