HP 1820-24G-PoE Plus, Installation And Getting Started Manual

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Troubleshooting
Testing the Switch by Resetting It
Testing the Switch by Resetting It
If you believe the switch is not operating correctly, you can reset the switch
to test its circuitry and operating code. To reset the switch, unplug and plug
in the power cord (power cycling).
Power cycling the switch will cause the switch to perform its power-on self
test. Resetting the switch can also be invoked from the Web interface.
Restoring to Factory Defaults
If you forget the switch IP address or password, you can restore the factory
default configuration by pressing the Reset button.
To execute the factory default reset on the switch, perform these steps:
1. Using a small, thin tool with blunt ends (such as a paper clip), press the
Reset button on the front of the switch.
2. Continue to press the Reset button for more than 5 seconds.
3. Release the Reset button.
The switch will then complete its self test and begin operating with its
configuration restored to the factory default settings.
After completing this procedure, there will be no password, the IP address
will be returned to the default 192.168.1.1, and all configuration settings will
be returned to factory defaults.