Re: Ignition on but could not start
Not sure what you mean by the "crunk" sound.
If the battery is nearing the end of its life, you will suspect it from how it behaves in the past few weeks. It will be turning the engine more slowly than usual when starting - feels like there is not enough battery power to turn it, takes a bit longer than usual. These are some of the signs that the battery is getting weak.
If all of a sudden you cannot start, from the usual robust starts, then it may be the starter motor.