BB Curve 8300 :: Speakers Not Working On It?

The speakers on my Blackberry 8330 appear not to be working. Even if I have the volume type set as loud it will just use vibrate when calls come in. I took out the battery and put it back in and it's still not working. If I try to play a song or ring tone, it will show it playing but I'll hear nothing, however I can still hear people talk during calls. I don't think this is caused by damage, my phone is about 8 months old and I've dropped it a few times (the worst probably from table height) but I wouldn't consider those serious falls.I need to know if this is something i can fix myself or if I have to mail in my phone to get it repaired.