alternator? on 1998 Hyundai Sonata

My car doesnt start but the lights and everything turn on. I was told its the alterntor but want to be sure before I buy the part. Is there anything I can do to be positively sure its the alternator?

Asked by for the 1998 Hyundai Sonata
Have you tried jump starting the vehicle? Is the battery OK?
You need to have a good battery and a running engine to properly diagnose the charging system, so do that first before even thinking about replacing the alternator. This may best left to a shop, they can test this out in about a half hour.
2 answers
First: check if the battery is OK if not change or charge
second: get a muti tester check the voltage of the battery Note: Engine is Running.
It should register 13.8 - 14 volts DC. if below the specified volts@ 13.8 there's something wrong on the alternator voltage regulator.( need to change).
But in regards to your problem I think there something wrong on the starter motor/solenoid. or on the wiring itself./ fuses.