After my front wheel got damaged I took it to the BS where I purchased it and they replaced it.
However, after riding it I have noticed that with the new wheel the dynamo hub (Shimano Nexus) works intermittently, probably because of problems with the connections between the wiring and the dynamo.
I have tried bringing it back to the shop for a check, but of course while there the dynamo was working fine and the light was doing its work, so the guy could not find anything wrong with it, just to have it dark again once I was close to home.
Before going again to the shop, I would like to check it by myself: I suspect it is either the wires going into the plug to be loose-ish or the connection between the plug and the case in the dynamo to be shaky.
Is there any check I can do to eventually fix it?