UART0 control in Total5200

I have a Total5200. I used to control it through UART0 (control port)
using HyperTerminal which suddenly ceased to work.

Instead of it showing startup sequence and such things it just doesn’t
show anything. Unfortiantly I don’t have the network configuration
linked to, so I can’t do it from the ethernet too.

I tried to swith to the dBug mode but it doesn’t send anything to the
hyperterminal too. I tried using phindows but no luck with that

Any ideas guys?

Can I use the console (running on UART3) to control my system? Is
there like a jumper or some hardware move that can get my control
port running again?