Hey p3dro,
did you get anywhere with this? I've got a 54 plate and haven't had the green backlight on either the dash or the oil/temp gauge for a while now but like you the needles still light up. When it first happened I took things apart as much as I thought I could whilst still being able to put it back together (was hoping to see something burned out and black or find a hanging where where something had come detached).
I've got a bit of an urge to get it sorted at last and saw your post.
chrisroth, June 2016
