Speakers not working properly anymore ?

[Dahem]

Hello,

My MBP used to work perfectly until a couple of days ago when suddenly I noticed that the sound output somehow changed (very low and sounds weird).
so I discovered that it doesn't output sound from the right anymore (only left works) and so I can't use it in stereo!

Does anyone know what the problem is and if it is software or hardware malfunction ?

 

[Dahem]

Bump!

 

[LCPepper]

Have you checked the speaker balance in Sound Preferences?

 

[Dahem]

Have you checked the speaker balance in Sound Preferences?

Yes when I move the slider to the left it makes a sound but when I move it right it doesn't.

 

[Barney63]

Does it work on headphones correctly?

Barney

 

[Dahem]

Does it work on headphones correctly?

Barney

Yeah it does , so is it a hardware problem and if yes how do I fix it ?