I'm back fiddling with this Mitutoyo DRO again!
I convinced myself that the fault MUST lie with the cables so I sent them to an electronic repair specialist (www.electronic.partners) for testing and they cannot find anything wrong!
I then decided to have a look at one of the glass scale units which labeled as "AT2-N250" with a Mitutoyo code number of "529-102-5", which I had previously cleaned using optical cleaning wipes.
There appear to be three lights and three 'receivers' for want of a better word, on opposite sides of the glass scale.
Does anyone knew if these are indeed three lights and should they light up when the unit is taken out of the track with the power switched on?
Brian