🔍 Key Concepts

• Basic troubleshooting sequence: start with the simplest, least invasive checks first • Differences between non‑destructive checks (no component removal) and invasive checks • How technicians usually find obvious faults before using test equipment

💭 Think About

• Which option would disturb the circuit the least and can be done very quickly? • Before using power supplies or test equipment, what safe, simple check might catch burned, cracked, or loose parts? • In an electronics maintenance manual, what type of inspection is usually listed before applying power or unsoldering components?

✅ Before You Answer

• Identify which choice is the least invasive action • Identify which choice can reveal burn marks, cracks, loose solder joints, or broken leads without applying power • Eliminate any option that requires removing components or energizing the circuit before basic checks are done