Resetting The Zywall - ZyXEL Communications ZYWALL USG 2000 Manual

I cannot download the ZyWALL's firmware package.
The ZyWALL's firmware package cannot go through the ZyWALL when you enable
the anti-virus Destroy compressed files that could not be decompressed
option. The ZyWALL classifies the firmware package as not being able to be
decompressed and deletes it.
You can upload the firmware package to the ZyWALL with the option enabled, so
you only need to clear the Destroy compressed files that could not be
decompressed option while you download the firmware package. See
29.2.1 on page 479
could not be decompressed option.
I changed the LAN IP address and can no longer access the Internet.
The ZyWALL automatically updates address objects based on an interface's IP
address, subnet, or gateway if the interface's IP address settings change.
However, you need to manually edit any address objects for your LAN that are not
based on the interface.
There is an audible alarm and one of the PWR lights is red.
One of the power modules is not supplying power. Press the BUZZER RESET
button on the ZyWALL's front panel to stop the audible alarm.
Check the power connections. Make sure that you have both power cords
connected to the ZyWALL and plugged into appropriate power sources. Also make
sure you have the power sources and both of the ZyWALL's power switches turned
on.
Replace the ZyWALL power module that has a red PWR light. See
page 800 for how to replace a power module.

51.1 Resetting the ZyWALL

If you cannot access the ZyWALL by any method, try restarting it by disconnecting
and reconnecting the power. If you still cannot access the ZyWALL by any method
ZyWALL USG 2000 User's Guide
for more on the anti-virus Destroy compressed files that
Chapter 51 Troubleshooting
Section
Section 51.2 on
799