Repair Technician did not know how to work with my pc.

I recently experienced pc troubles with my editing/VFX rig. It would not start no matter what. I tried everything I could think of, but was swamped with work, so I didn't have time to do a proper deep dive. I reached out to Dial a Nerd since I needed a home visit to just diagnose the problem, then I could go about replacing/repairing it. I had my rig disassembled and breadboarded on cardboard to make diagnostics easier ( a common step in troubleshooting problem PCs). The response was quick, and someone was sent out fast to my home. I was not at home, so my girlfriend received him. I got a call asking why my pc was out of the case. The technician, although kind, didn't want to touch it as he was scared he would break the system, which I would not expect from an IT repair service. I drove home to assist him, where he said the same thing, asking how he was supposed to turn it on. When I pointed out he could just use the pins on the motherboard, as every basic pc repair tutorial tells you to do when the case button is disconnected, he refused.

Finally, he pulled out his own power supply, which I hoped would be able to tell me if my power supply was the problem when he swapped that into the system. However, the psu he brought was for a desktop motherboard leagues smaller than mine/for a motherboard way older than mine. It would not be able to power my board. His advice to me was to put it back into the case and book it into their shop. Not before he tried plugging in the smaller psu and potentially frying my motherboard. They did not charge me for this quick visit, which I appreciate. However, it felt like an underqualified professional who didn't know how to approach a system that, in all honesty, should be something they have worked with before. If I had the time to wait till the weekend to take the pc in somewhere, I would not have requested a home visit.

Fairly dissapointed with the service, as no resolution was achieved.