Your question is Troubleshooting a Complex Hardware Failure. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you had to troubleshoot a hardware failure in a complex system. Walk me through your diagnostic process, how you communicated along the way, and what the outcome was.