First, try a soft reset. Do this by pressing the center button and the up volume button
simultaneously and try turning it on. If that does not work for you, you will need to get a micro
sd card (it can be a dummy) and insert it into the slot on the side of the
mp3 player. If you do not have one, you can use one of the round edges of a paper clip (be careful) to get it to come on. When you put either in, it should come on automatically, but if not, just press the power button. This should work.
If it does not work, you may need to get a firmware update from this
web site:
http://www.sandisk.com/Retail/Default.aspx?CatID=1376Remember that you need to
back up all of your information before doing the update.