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Q: car won't start on 2002 Buick Century

ok this morning i went to go start my car and nothing, no clicking , no anything but the lights,radio, and evrything else came on i don't know how to check my starter or anything like that so i need an opinion on what it might be!!!! PLEASE HELP ME !!
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You may have a bad battery, it may need to be charged and tested. Try jump starting your car form another car using jumper cables, allow the other car to start and run for a few minutes to charge up your battery a little. It could be a bad or unsecured battery ground cable between the battery and chassis or chassis and engine. Turn on the ignition switch to the on but not run position do you see an icon on the instrument panel representing a battery, if you do not see this battery icon the alternator is not seeing power to allow it to charge. Start the engine does the battery icon go out. A more complex but good diagnostic test is checking "voltage drop" on the battery ground and power cables. You can find a video on how to do a voltage drop test on youtube. Put a volt meter across the battery terminals with the engine off, at rest the battery voltage should be 12.6 volts if the battery is fully charged. Now get a friend to start the car while you watch the voltmeter, the voltage reading across the battery should read approximately 14.6 volts if the alternator is charging correctly.
It could be many other things like a bad ignition switch or wiring problem but this is a place to start.
well i checked the battery and its fine so i got someone to look at it and thy told me i needed a new key and come to find out i didnt need the key now the guy is saying i need a new ignition switch should i go get a diagnostics on it so i can see whats really going on with my car?
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