Hello
I need some advice for my tnc 151 control, because dont start, it was working fine but suddenly turn off and now don't start my machine and only 4 leds turn on in the tnc151 and the VDU is dark, already check the overload contactors and relay and all is ok the voltage in the tnc is 24 vdc and the suply of 110vac is also fine, what culd be the problem? the vdu or the control?(if the vdu fault the control cannot start?).
thank you for any suggestion.

bad monitor will not stop the control. If you were running the same program, you coiuld push the button and go.

thank you Gus
actually my last hope was that, because now my main suspicion is the control, anybody know if some type of code exist in the leds of tnc (only light four and one of them turn off and on sometime) and the rest of the machine dont start.
thank you for the reply.

power supplies are due to go for the same reasons as the monitor[caps]

Call heidenhain service and see if they have a clue. Caps can be replaced, power supplies can be stolen from other dead controls.

thank you for the reply Gus
I will try call heidenhain for more advice i hope that solve this.