This all too-common exchange at work;
Idiot: 'X-device' is not working.
Me: Can you explain what the problem is or tell me what the error message is (they have screens that literally tell you what the problem is)?
Idiot: I don't know, its just not working.
Some of these can and have to be fixed remotely, others require a simple reset I can walk you through over the phone. Other issues may require that I attend to the call with tools. Now I need to walk there and check what the issue is, either lugging tools I don't need or having to go back to fetch something I could've had with me in the first place if they just provided more information. Nothing infuriates me more than vagueness when asking for assistance.