The short and the sweet of their message is that their GE/Datex-Ohmeda Anesthesia Module has not functioned properly since they experienced a large power outage two months ago. The fuse was burnt, so they replaced it, but the unit is still not working. Like Geoff, they suspect the power supply. They would appreciate and ideas. If you need more info, they are happy to send what you need.
I've asked our engineers for their advice. If you've got any ideas, I'll be happy to try to translate, but I must admit my technical Spanish is poor at best.