I'm only getting sound out of one headphone when I play music. I've tried many different headsets with identical results. How do I fix this?

The tablet may be having trouble detecting that the headset is plugged in. You could try an app named SoundAbout (search for it in Google Play) to manually route the media audio to the headphones.

Did you try plugging in a different set of headphones? If other headphones work, maybe you need new headphones.

Try playing music from your Sansa through the computer, while it is tethered. If you can do this, it may mean that the audio amplifier part of the Sansa is broken-- Usually this means, 'get another Sansa.'

Also, try gently wiggling the headphone plug to the left and right, while it is plugged in. If you get music on and off, its possible that the headphone connector on your Sansa has a broken connection. This is a VERY difficult problem to fix (without breaking or melting something else inside the case) and also usually means it is time to get another MP3 player.

Unfortunately most phones cant use the bluetooth headset to play music thru you will need to purchase a set of bluetooth stereo headset (headphones) like these
Google Search: Bluetooth Headphones

To reset it just reverse what you did before it went out, example, headphones plug in and it comes out real quick now theres no sound, turn off the phone and plug the headphones back in and turn on phone with headset in 3.5mm jack then unplug after phone has fully rebooted and ready for use.Trust this works cause i ve done it a many of time since i hooked it up to my car to listen to music. ps did you know you can change the sound effects under the menu while the music is playing to different types of bass levels.

After trying this myself with a pair of samsung headphones, I searched online and found a review that said the LG Scoop/Rumor doesn't support stereo bluetooth, so the music player probably won't connect to the headphones.

I think the problem is that the media player plays the sound from the speaker instead of sending it to a bluetooth headset. have a look into the media player options and settings, also try a headset or headphones that you can plug in the phone, that should work also.

Try playing with the headphone plug, until you can also hear the right
channel and also try a different set of headphones as it is probably a
matter of an intermittent headphone jack, or plug, owing to sudden
snatching of the headphone plug from same, a very common problem.

Eliminate this cause before submitting your Touch for much more
expensive remedies

i need zen v plus 1Go usb drivers

i had acer aspire 4220... When i play music there is no sounds from built in speaker but when i used headset it sworking... im ronald please help me this problem.

I had the same problem with a Samsung phone. There are two ways of fixing this; First, you can remove the S9 profile from your phone's bluetooth list, and then add it again, going through pairing and entering 0000 on your phone when asked for the code.
Alternatively, you might try pressing the "play" button on the right earpiece on the Motorola S9. This is supposed to kick it into the A2DP stereo mode for music listening.
Good luck.
And get a copy of the manual from the Motorola web site at http://direct.motorola.com/ens/s9/Headset_Home.asp I found this very handy for checking what the little flashing lights mean. When you get stereo reception, the little LED in the middle of the headset flashes green, not the usual blue and red and purple for voice calls. 
In case you didn't know, as a phone headset, with the microphone activated, you only get sound in your left ear, and the light flashes blue. For music, you get both ears, and it flashes green. So if it ain't green, you are in mono mode.