Thin Station - Black Screen when session disconnects

[FN-GM]

Hi,

I have setup ThinStation on a new network. I am using it with a Samsung V25 laptop. The idea is they are to be used for emergency thin clinets.

On the logon screen when the session auto disconnects as expected, but the laptop just does blank with nothing on the screen. The only way to get back in is to turn off the laptop and start again.

Does anyone have any ideas please?

I have attached my config.

Thanks