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NAC Manager not rebooting when I configure HA on one of the server

I've got an issue with a NAC Manager 3355 that is not rebooting when I configure HA.

I've tested this process multiple time.

I install the CD. I did test with version 4.7.0 or 4.8.2

After the installation I reboot.

I do the basic configuration. From the menu, on the screen and keyboard interface directly connected to the system.

IP address



DNS Server

I create an SSL Temporary Certificate with as the host name.

Nothing else in the certificate.

I setup passwords

I reboot. It works.

Then I connect to the web interface.

I could change some configuration and reboot the machine.

It works no problem.

Then I import the SSL certificate from the primary

I do the configuration for the HA stuff...

I update the configuration.

If I reboot, the screen on the NAM is locked with :

GRUB Loading stage1.5.

GRUB loading, please wait...

And, there is no IP connectivity.

On my other server, there is no problem with this process...

What should I do ?

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