Bernabe, you may have dislodge or even broken part of the speaker assembly. Hard to say and the only way to find out is by opening it and surveying the damage. The manual is available online at Dell Hope this helps and let us know what you find. Good Luck.

Bernabe, the speaker connector is on the left side. Please follow Dell's instructions (found here) in order to reseat the connection (Connector 6).

PS: That manual assumes that you have the Dell Studio 1557 or the 1558. If you do not have that model (Check the bottom), please respond with the correct model number and I can look for it.

thanks..ama try that.. well see whats goingon.. by the way.. my right click seems stuck what can i possibly do there?

It sounds to me like two related problems. The speaker problem sounds like either a connector fault, a marginal connection or a broken circuit board trace. These are all similar problems from an electronic standpoint, and are basically equivalent to "the connection is broken because some physical thing isn't making contact any more." The stuck right click is probably either a case mis-alignment or something which broke off inside and got itself jammed underneath the button.

If you remove the case around the keyboard, you can examine the area to the left of the keyboard and look for the connection problem. A good, strong flashlight and a magnifier might help. Once the bezel is off, you can probably see what's going on with the button. If not, probing with a thin piece of plastic can be a useful and (most likely) non-destructive way of finding out.