I had this issue today! I googled "sansa clip won't respond" and found a page where someone said to hold the on/off slider in the up position (as if you were turning it on) for about 15 seconds. Then turn it on like normal. Apparently it's a soft reset which returns the player to the last successful shutdown. SO helpful! I'm SO glad, I was worried that it was broken!

My Sansa Fuze won't turn on, either. However, when I plug it in, my computer recognizes the thing. So even though there's no screen or blue light, I can move files around and add music to the device.

When I unplug it, the screen and light still won't turn on. I've tried doing resets a million different ways (with the home button, without the home button, to a count of 15, 20 or 60, etc.), but nothing has happened. It seems hopeless! :( Another Sansa bites the dust! What should I do? I'm so tired of having to replace these things after four months (this is the third time!)

I had the same problem with my 4GB clip. The restart trick was pure genious. I had just bought it today and really was hoping I would not have to return the thing. Thanks folks!

My 8GB sansa clip would not turn on at all after putting a 4GB card into it.
The widely-diseminated 'hold down the power/reset for 15 seconds' achieved nothing.

Holding down volume + and pressing power/reset made it turn on straight away. It displayed the logo for 40 seconds, then continued playing the previous track where it left off.