Quote Originally Posted by CarpeDiemIris View Post
They only start working if I unplug and re plug the small round cable after the power supply.
Hello,

So if I understand correctly, they are now working?
This happens if the time between power outage and repowering is too short.
It is important to wait about ten seconds after unplugging a Mitras LX7 before plugging it in again (time for the electronic capacitors to drain properly). Otherwise the electronics is in an unstable state which produces the phenomenon described.

Gaël