What are the reasons for no response when starting a car?

[McJosiah]

The reasons for no response when starting a car are: 1. There is a problem with the control circuit of the starter; 2. The starter brush is faulty; 3. The battery voltage is insufficient; 4. There is an issue with the relay; 5. Poor contact of the starter's magnetic switch. The solutions for no response when starting a car are: 1. Check if there is a problem with the control circuit of the starter; 2. Check if the starter brush is faulty and replace it in time if there is a problem; 3. Adjust the battery voltage; 4. Check if there is an issue with the relay; 5. Check the contact condition of the starter's magnetic switch; 6. Check if the starter wire is loose or detached, and whether the switch or adsorption switch is malfunctioning.