Reset without RESET button

If you have a Juniper SRX650 firewall stuck in cluster mode and there's no RESET button on it, you can follow this procedure to reset it.

1. Connect to the firewall via the console port.
2. Press spacebar during the boot.
3. Enter the following commands into the command line.

boot -s
request system zeroize
yes

The system will reboot.

4. After the system reboot, you can enter the following command in the command line.

set chassis cluster reboot

The system will reboot.

5. After the system reboot, you can enter the following commands in the command line.

config-wizard
cli
configure
load factory-default
set system root-authentification plain-text-password
exit
exit
reboot

This will restore the factory configuration and set the password of the root user.
The system will reboot a last time and start with a blank configuration.