How do I know if I have an onboard soundcard?

[Fledge]

I have a Dell Dimension E520 and even witht he help of Dell forums and CPU-Z I do not know the specifications of the motherboard.

I will be selling it on ebay so I NEED to know if it has onboard sound or not.
It doesn't have an 'actual' sound card.

This may seem like a silly question.
Please help!

 

[Fledge]

I was scared that it was a completely ridiculous question
Yes it has sound outputs, back and front and yes I have heard sound from it xD

My bad
Thanks all ^^