Jigsaw not communicating after 5 years

Dear,

I've been a happy user of the jigsaw device (CC-J-1) for nearly 5years now. However, after a recent update the system does not seem to communicate anymore with the network and I can't connect to the device anymore.  I've performed several network scans but the device won't appear.  The UTP indicator lights are not flashing. In the mean time the device kept executing the timed tasks on KNX. 

To resolve the issues I've reset the device, I think successfully as it is no longer executing its KNX tasks, but the system will still not appear in the network.  As if it is unable to communicate, I have replaced the UTP cable and have connected it directly to the main modem. No success. 

is there anything else I can or try to bring the device back to working order?

regards 

Wout