Server not connecting to V2-10

http://192.168.7.2/ doesn’t seem to be working.

We are busy with a demo. The machine was connected and homed. Suddenly, the machine disconnected and now the machine won’t connect at all.

V2-10

When I connect the v2-50 machine it does connect to the server?
Same cable and network.

What could be the problem?

Does the V2-10 have its red estop button lit up?

No nothing lights up.