Just about every person I've used this prompt on has found the prompted error, and then gone on to find a few more. However, I don't really care about the number of errors you find nearly so much as I do seeing and hearing you reason your way through a new problem.

I don't expect you to find all the issues. (But if you do, then congratulations! I'm gonna try to hire you.) I do expect you to talk to me about your thought process when confronted with a novel issue.

That's what good electrical engineers do. They don't know all the answers - they reason their way through unexpected challenges.