What is wrong beside the nouns on my dell Inspiron E15050 laptop?

I enjoy windows xp medium center edition.
Here is the deal.
nouns works perfectly beside headphones, problem is next to the internal speakers.
sometimes the sound out of the internal speakers is freshly fine, but also....the sound literally go on and off, depending on how I rotate and tilt and erect up on a side of the computer...this seems close to something is wrong inside.any ideas?

Answer:
The speaker connector might be fruitless or moved somehow, if you can remove the keyboard and touchpad you should be capable of see the speaker connector and check it.

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