Warning: I am not a licensed electrician and I do not have any professional qualifications. Circuit repairs are extremely risky (such as electric shock, fire and even life-threatening), and incorrect operations may have serious consequences. If you have no experience, it is strongly recommended that you do not repair the wiring in your home by yourself, but hire a licensed professional electrician to handle the problem. If you still want to learn some basic safety knowledge, here are a few extremely important notes, but please be aware that this is by no means a substitute for professional training and practical experience: 1. Power-off operation: Before repairing any wires or appliances, be sure to turn off the circuit breaker of the relevant line and unplug any power plugs that may be connected. Use a certified non-contact voltage tester to confirm that the circuit is completely de-energized to ensure that live parts are not accidentally operated. 2. Appropriate tools and personal protection: If you have to operate (such as just checking or performing simple parts replacement), make sure to use tools with good insulation performance and wear appropriate personal protective equipment, such as insulated gloves and protective glasses. 3. Understand the circuit structure: The design of home circuits may involve complex wiring and regionally different circuits (such as main distribution boxes, branch circuits, etc.). Without a full understanding, rash disassembly may not only fail to solve the problem, but also introduce new hidden dangers. 4. Comply with local regulations: Many countries and regions have strict regulations and standards for residential power maintenance. Unauthorized modification of the power system may violate regulations and pose legal risks. 5. Learning and training: If you are interested in electrician work, it is recommended to participate in formal electrician training courses to obtain the necessary theoretical knowledge and practical experience before considering related maintenance work. In short, due to the high risk of circuit maintenance and the possibility of serious accidents due to incorrect operation, the safest practice is to contact a certified electrician for inspection and maintenance. Please do not underestimate the risks of doing it yourself. For the safety of you and your family, be sure to choose professional help.