I've got no illumination or movement on either of my dials, is it likely to be the whole units failed or something else. The indicators still light up though
No dials working sounds like a simple earth fault from the instrument binnacle to me.
On non-EL, the indicators have their own feed but supposedly share the earth for the tacho, so the tacho should be working. However, I found there are mistakes on the wiring diagrams when it comes to pin outs for the earths, so...
I have el dials but I kept having intermittent needle issues now nothing at all, it could well be damp issues as I was also having problems of my brake lamp glowing then going off and my fuel and temp light were slow to light up