Can't get new SanDisk Clip Sport to turn on

I have a brand new Clip Sport…loaded an mp3 audio book to it…listened to it for 1-2 hours one evening. Worked great! Next evening, I couldn’t turn it on. Heard that there is no reset on this Clip Sport. Plugged it into computer for 2-3 hours…still nothing. Any suggestions???  

Reset is holding the center select/power button for 20 sec. Also plugging it into USB should turn it on as well. If you have done the reset and it still is not coming on it would seem it is bad and would need to be replaced. 

I was afraid of that…I’ve done what you said with no luck. Guess I’ll be making a trip back to the store. Thanks for your response.