User's Manual

Chapter 28 Troubleshooting
P-663HN-51 User’s Guide
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• If you changed the IP address (Section 6.2.1 on page 76), use the new IP
address.
• If you changed the IP address and have forgotten it, see the troubleshooting
suggestions for I forgot the IP address for the ZyXEL Device.
2 Check the hardware connections, and make sure the LEDs are behaving as
expected. See Section 1.4 on page 23 and Section 1.5 on page 25.
3 Make sure your Internet browser does not block pop-up windows. See Appendix C
on page 201.
4 Make sure your computer is in the same subnet as the ZyXEL Device. (If you know
that there are routers between your computer and the ZyXEL Device, skip this
step.)
• If there is a DHCP server on your network, make sure your computer is using
a dynamic IP address. See Section 6.2.1 on page 76. Your ZyXEL Device is a
DHCP server by default.
• If there is no DHCP server on your network, make sure your computer’s IP
address is in the same subnet as the ZyXEL Device. See Section 6.2.1 on page
76.
5 Reset the device to its factory defaults, and try to access the ZyXEL Device with
the default IP address. See Section 2.3 on page 29.
6 If the problem continues, contact the network administrator or vendor, or try one
of the advanced suggestions.
I can see the Login screen, but I cannot log in to the ZyXEL Device.
1 Make sure you have entered the user name and password correctly. The default
password is 1234. This field is case-sensitive, so make sure [Caps Lock] is not on.
2 Turn the ZyXEL Device off and on.
3 If this does not work, you have to reset the device to its factory defaults. See
Section 2.3 on page 29.
28.3 Internet Access
I cannot access the Internet.