Changing A Power Module - ZyXEL Communications ZyWALL USG 2000 User Manual

Press the RESET button and hold it until the SYS LED begins to blink. (This
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usually takes about five seconds.)
Release the RESET button, and wait for the ZyWALL to restart.
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You should be able to access the ZyWALL using the default settings.

56.2 Changing a Power Module

The ZyWALL has two power modules. It can continue operating on a single power
module if one fails. The power modules are near the top of the front panel of the
main chassis. Obtain ZyWALL power modules from your local vendor. Use the
following procedure to change a power module.
Make sure that the power module you want to disconnect has the power switch in
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the off position. You only need to turn off the power module that has failed. The
ZyWALL can continue operating on power from the other power module.
Disconnect the power cord from the power outlet.
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Disconnect the power cord from the ZyWALL's power module.
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Use a Philips screwdriver to remove the power module's retaining screw.
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Figure 576 Removing the Power Module Retaining Screw
ZyWALL USG 2000 User's Guide
Chapter 56 Troubleshooting
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