What's the reason when the key is inserted but the car won't start?

[LaVivienne]

When the key is inserted but the car won't start, it could be due to the following reasons: 1. The anti-theft lock is engaged. 2. The steering wheel is locked. 3. The battery is dead or there is no fuel, among other possible causes. Here are some solutions: 1. Check if there is power in the live wire entering the ignition switch. If there is, the ignition switch is functioning normally; if not, there is a fault before the ignition switch. 2. Check if all wire connections are loose, detached, corroded, or have poor contact. 3. Insert the key and turn it to the ignition position without moving it, then check if there is power in the live wire of the starter motor's solenoid. If there isn't, the ignition switch is faulty; if there is, continue checking if the solenoid has any faults—check if the solenoid coil is open, if the wires or connections are loose, corroded, or have poor contact, etc.