Why won't the speaker turn on?

I have charged the speaker up, with a red light appearing constantly while it's charging. When it has finished the light goes blue. I then proceed to try and turn it on by holding down the power button but nothing happens. The problem isn't the bulb because it will go red or blue depending on the charge and the only help I can find relating to my problem says to turn it on and off when I can't do either. I have tried the reset button but that won't work either someone please help