Stone dead

[M.A.N.]

Took my Fazer 2003 for a drive. Stopped for a few minutes at a parking lot but then it did not start - absolutely nothing happened when I turned the key / pushed the start button. Thought it might be the battery so tried to bump start it but not even the slightest tendency to ignite. Back home I started to check the battery and this is OK (12.5V). Checked the main fuse, also OK. Thought is was the starter relay as there in no 'click' when start button is pushed, so replaced it but still stone dead. Before when it was working, there was always a ticking sound for a few seconds when I turned the key, but this is also gone.

I am out of options now :'( . Anyone who can guide me in the right direction? Thx!
//Mats