Iīve checked the grounding points, all seem to be OK. Checked wiring under the ignition and behind headlight, nothing seems to be wrong there.
Jerked all the wiring around to see if there were any poor connections, but to no avail.
All fuses OK. (At least the ones I found under the seat)
The bike fires up without any hesitation and runs just like before.
All signal lights in the panel work (turn, high beam, neutral etc)
Tacho needle at zero, panel backlight works, but no visuals on it at all.
So, it seems like the panel is broken, but I would really like to know how to measure to make sure it is.