1.3 auto staring issue

My Micra won’t start . This is an intermittent problem. I turn the ingnition key. ( it’s a1.3 automatic) . The ignition lights all come on ,I’m in neutral or park . No noise from the starter motor. Nothing . I go under the bonnet and randomly fiddle with wires and relays . Try to start it on the key again . I repeat this process until it starts . Or doesn’t start and I give up for the day . Any ideas . It’s done 135 k. And is regularly serviced .