"Oh, indeed, it is", he tells her, "the equipment for you to use, I mean. As is it natural for malfunctions to occur when handled by - well, someone in training."
Harry gestures her to sit down while he remains standing, making her look up to him. "We can assign blame on the manufacturers, experts in their field, and testing the equipment for deficiency. Or we can place the blame on the one who maintains them, which would be yours truly." He points to himself, letting the sentence linger in the air a bit. "Alternatively we could look to see who was using it while it broke, who may, or may not, have used it incorrectly."
He could feel her shame earlier. It wasn't uncommon for students to break things accidentally, and he was sure that she herself thought that she was at fault. What remains was for her to admit it.
"It would pain me to eat my own words if we were to find out that it had been indeed my fault. But if I had done something incorrectly in maintenance, I would try to learn from it... If you truly are not at fault, I will apologize, of course. And, unless you have broken it intentionally, you will not be punished, of course, mistakes happen."
He lifts her chin up for her to face him in case she were to avert her eyes. "Now tell me, Ms. Lund, what did you do before it broke?"