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Hi this is Bryan, when you say this makes the usual sound how do you mean? You hear a click? Do you have a voltmeter? And tools to take this apart?
Okay this is a dual burner correct? There are really only two parts that could be the issue in this one is the burner itself and the other is the infinite switch, this is the burner,
my guess is however because neither high nor low works or in other words the inner or outer part of the burner doesn't come on at all it's the infinite switch,either way to be sure you would need a voltmeter in be able to take this apart to test these, you may need to call for a service tech at this point, thanks, Bryan