Sound not coming through laptop speakers, but works with headphones

[starsplash]

Hello.

I've got a Thinkpad T430s (Windows 7) here and it's acting strangely. Namely, if I play a clip through the laptop's speakers, I hear no sound, but when I plug the headphones, everything works nice and neat.
One thing I noticed, is that computer actually recognises the sound, because the volume mixer/application, at the lower right/tray, and it's volume bar shows me the green indicators jumping up and down, as the music plays.

Of course I've tried reinstalling the drivers, I've uninstalled the audio device in Device Manager and restarted the computer. And yes, the obvious things are also checked - nothing (the applications) is muted in the volume mixer, default device is correct under playback devices.

Some have reported on the web, that it might help to use toothpick for example and "un-jam the sensor", but that didn't help either.

I've also tried booting up the newest Linux Mint (has pretty good multimedia support) from the USB and I heard no sound through speakers.

So I'm out of ideas here. It looks more and more like a hardware fault, but how can I be absolutely sure?


Thanks for helping out,
starsplash

 

[fireberd]

The internal speakers on most laptops (all I've seen) are on a connector or two connectors. Reseating the connector(s) (unplug then plug back in) will usually fix bad connection problems. However, the Laptop has to be disassembled (to some point) to do this. Although not the only potential problem, the most likely.