I hate to be the one to deliver the bad news... but it sounds like your power supply has died. Here in the states we've had problems with the power supplies on 616's and 100's... but I think it's a completely different power supply on the 816 systems.

I would suggest powering the unit down. I'll do some research and hopefully in the meantime one of the other techs who have more experience with the older systems will post.

We also have some users on your side of the world… maybe they can point you towards another dealer.