It is also possible that you have a v2 version of the player.
See the here for a description of how to tell if it is.
Actually, any button works but centre button is still the common advice though, since it doesn't have nasty side effects.
If the Sansa hangs and normal power-off does not work, confirm that the lock switch is off and the charging cable is unplugged, then press and hold the power button until the unit shuts off (this could take upwards of 30 seconds, but it will eventually work).
The center button does work for entering charging mode on your player, but only if the player is already powered on and booted into Rockbox.
If you attempt this with the player turned off, it will boot into the OF.
You'll notice that when the backlight goes off the buzzing stops, so if you want to have clean audio recordings, simply adjust your backlight settings accordingly.
On some tracks, the audio distorts, even at low volume and with a clean source track.
Because Rockbox is an open-source project developed by volunteers, there is no set timetable for any release.
In order to continue, you first need to restore the original San Disk firmware to your Sansa.
Common problems with the San Disk Sansa Clip Zip MP3 player include the device not turning on or not being recognized by a computer, the selected song not playing, the device freezing up, podcasts not playing, and artist and album information not appearing for the selected song.
The error codes of the bootloader are: I installed Rockbox before using the old method (without sansapatcher).
Now when I try to use sansapatcher, it gives me the error "OLD ROCKBOX INSTALLATION DETECTED, ABORTING". The sansapatcher tool has detected that you have previously installed Rockbox using the old installation method.