If the battery light blinks but car will not start but lights up what is cause? on 2007 Hyundai Entourage

This just started and if it sits for a minute or two afterwards it starts up. The alternator was just replaced recently also. Usually my husband does the work but if it isn't something easy to fix I would like to know possibly what it is before hand so I know what to talk about when I take it too a mechanic.

Asked by for the 2007 Hyundai Entourage