I'm new to vaping and just got it. When I try to use it, it doesn't fire and only blinks when I hit the button. My friend has the same one and his makes a sound when you hit the button to take a hit like it's heating up or something. I've tried to replace the coil on it and it didn't do anything differently. I've charged the thing until the indicator light goes off too. I don't really know what the problem is, so if anyone has any suggestions that would be helpful.