e330 Sound Problem

[Yegor]

I have no idea what happened, the sound is really getting screwed up. The external sound works really crappy. The system sounds don't work (most of the time) and when I play music, the sounds is really crappy, and sometimes dissapears.
Headphones are pretty bad too... they go on, and off randomly.
What happened? Everything was fine 2 days ago!!
Help!