ZyXEL Communications NBG6503 User Manual

 Chapter 23 Troubleshooting

NBG6503 User’s Guide

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick 
Start Guide. 

Make sure your Internet browser does not block pop-up windows and has JavaScript and Java 
enabled. See 

Make sure your computer is in the same subnet as the Router. (If you know that there are routers 
between your computer and the Router, skip this step.)

• If there is a DHCP server on your network, make sure your computer is using a dynamic IP 

address. See 

. 

• If there is no DHCP server on your network, make sure your computer’s IP address is in the 

same subnet as the Router. See 

Reset the device to its factory defaults, and try to access the Router with the default IP address. 
See 

.

If the problem continues, contact the network administrator or vendor, or try one of the advanced 
suggestions.

• If your computer is connected to the WAN port or is connected wirelessly, use a computer that is 

connected to a LAN/ETHERNET port.

I can see the Login screen, but I cannot log in to the Router.

Make sure you have entered the password correctly. The default password is 1234. This field is 
case-sensitive, so make sure [Caps Lock] is not on. 

This can happen when you fail to log out properly from your last session. Try logging in again after 
5 minutes.

Disconnect and re-connect the power adaptor or cord to the Router. 

If this does not work, you have to reset the device to its factory defaults. See 

.

I cannot access the Internet.

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick 
Start Guide.