no sound on media player

inastall updates or use kaffeine player one of good player include most of plugins and video player

Hi :)

Check the icon by the calendar on the top taskbar. Check the Volume Control as that leads to a sound mixer and sometimes one of the channels hidden in "Preferences" might be set too low. I also find that wobbling the PCM & Front channels sometimes seems to unstick the sound. Watch out tho because it can suddenly leap into life at that point! Also check the speakers are plugged into the right socket on the machine. It should be one of the green sockets.

Otherwise hopefully this guide should help
https://help.ubuntu.com/community/SoundTroubleshootingProcedure

But first i would suggest working through all the steps in this guide except i would miss out the optional step.
https://help.ubuntu.com/community/Medibuntu

Personnally i much prefer MPlayer to Kaffeine. It avoids a whole shed load of dependencies. Err, this guide might help with looking up odd terms and different programs
https://help.ubuntu.com/community/SwitchingToUbuntu/FromWindows

Good luck and regards from
Tom :)