I have a new sansa express that worked when I originally opened it. I was able to transfer some audio files onto it and it played them fine. I plugged it into the usb on my computer (Mac OS 10.3.9) so that it could fully charge for at least 2 hours (as per the instructions for first time charging). The OS system recognized it and displayed its icon on the desktop. When I returned to the computer a couple of hours later, the icon was gone from my desktop and the LED screen on the player was blank. I attempted to turn it back on, but nothing happened. Tried to hard reset it too. Still nothing.
I should also note that the computer had gone to “sleep” while it was plugged into the usb port. Do not know if this had any bearing on it. Has anyone else encountered this problem?