Sansa mp3 player unmute

The ring within the buttons is the volume controller move it clock or anti clockwise

You mute/unmute with the volume controller on the right upper side of the tablet. If it's muted, run the volume all the way down to zero, at which point the slash mark through the volume icon will disappear. Then you can set your volume level.

Look further than the batteries. Take the whole thing apart. That's what I do, and I've fixed a lot of things. And keep looking on the internet. A few hours of looking can result in years of listening.

Press and hold the power button for 15 seconds. It will unmute with this reset.

Good morning, afternoon, evening or night, whatever time you are viewing this. You are having trouble downloading videos onto your MP3 Player? Well there is a reason for and you probably won't like this... There is no way you can play videos on this MP3 Player. Sansa Clip doesn't support video files, only music files and audio podcasts. Sorry about this, but FixYa encourages you to come visit the website again soon. Again sorry, but I hope you have a good day, evening or night, whatever time you are viewing this solution post.

You can download the manual from
http://www.sandisk.com/sandisk-support/warranty-and-user-guides

Power off the unit. Blow the keypad as strong as you can. Power on the unit.

my unit only muted when the engine was running it was on telephone mute or something (redphone at corner with cross thru it)to get the unit unmuted while the car (corsa B) was running i had to cut the brown wire labeled mute at the back i jst covered the bare wires with some tape and it worked fine

O.K. this was a tough one.  I started here. Without asking for help in the sansa forum I reviewed the entire user manual.  This manual (as you may already know) does not contain the words "mute" or "unmute". So I will refer you to the forum sansa has set up for users.
http://www.retrevo.com/support/Sandisk-Fuze-MP3-Players-manual/id/16010ci075/t/2/

retrevo is a great source for manuals, reviews and support for all electronics.  I would go to the support group sansa has and ask there.  If no unmute is found, this solution will surely unmute your player.  However if you do resort to this your player will be reset to factory settings.  This will not affect memory, but all your system settings will be reset.   That means any customized wallpaper settings, art displayed in lists, backlight, power saver, language, date and time, brightness and volume settings will be restored to their original status!  Memory content will not be affected!  Only formatting the memory drive will delete memory content. So...
This will restore the player to its original factory settings.
1. Press Home button to return to the Main Menu.
2. Select Settings.
3. Scroll down to System Settings and select it.
4. Scroll down to Reset Factory Settings and select it.
5. Use thumbwheel to highlight Yes then press the Select button.

reinstall the mp3