It is easier to replace an ignition switch than manually attempting to repair the device. The ignition switch may have failed if a vehicle does not start or if the dashboard lights don't turn on when the key is turned to the on position.
Replacing an ignition switch varies based on the car. Sometimes an ignition switch is replaceable by simply removing a few screws and putting a new switch in. For other vehicles, the entire steering column must be removed to add a new switch.
The ignition switch uses power from the car's battery. Before replacing an ignition switch, be sure to check that the vehicle's battery is charged. Most mechanic services replace an ignition switch for a fee.