black screen when log in the security lock down standard version.

Posted: one year ago Quote #17209
When log in the security lockdown standard version.It stay the black screen ( i know the security lockdown is running but only the mouse can move, no other things can do )

This computer is already under my " Manage Devices " but it's not online. How can i make it online now?  I can not do anything now.
If it can connect to the new network, i can try to disable the security lockdown remotely.

I tried connect the network cable, it works(i can see the cat connector jack flash green light, but i can not see it online on my " Manage Devices ".

Very urgent ... I'm looking forward to your help.
Posted: one year ago Quote #17210
Please see the this forum post.