The answer to 'how to replace electrical repair' is to identify the specific electrical issue, gather the necessary tools and materials, turn off the power, and carefully follow the steps to replace or repair the electrical component. This may involve replacing a switch, outlet, or other electrical fixture, or troubleshooting and repairing wiring issues.
It's important to take proper safety precautions, such as turning off the power at the circuit breaker, using insulated tools, and working slowly and carefully to avoid the risk of electric shock. If you're not comfortable performing electrical work or the issue seems complex, it's best to call a licensed electrician to handle the repair.