G0ROZ-3 disappeared off the map again this morning. www.aprs.fi showed the last beacon at just after 0700 Hours.
I made a trip to site, via HQ to collect the keys, and found the computer locked up. Only completely disconnecting the power, switching the power back on again and starting the computer would make it work.
In spite of Surge Protection and a UPS it would seem that a power spike had locked the computer up again.
It looks like running the system on battery power will be the only way to sort it out.