Sinclair label applicator, the type that puts those little oval labels on your apples and oranges..the carriages wont respond and park themselves according to the program.
Open cabinet...first thing I see is two components showing fault...
But then realise they're not in use, no wires connected out the bottom.
Various visual checks, reset trips, reboot etc etc, phone the suppliers, further checks draw a blank.
Low voltage side...just visual checks, loose wires, connectors, resets etc.. no joy.
Go back to it just to have a deeper look for damaged wires...anything really, took a side panel off the machine itself and saw the top rear plug had pulled itself out...haha, reconnected,
Bad design really, those cables are pulling the plug downwards.
I'm a time served (not qualified) mechanic with very basic 3 phase experience. My dad who used to work on Vulcans used to say of such problems...you always fear the worst...but it's usually the simplest things that cause problems. How true.