Can't turn up the volume ?!

[Mr. Orange]

Here's the issue. About a week ago the powersupply of my computer blew/shortcircuited whatever. This caused damage to my motherboard which I had to have replaced. When the new motherboard was put in, my hard drive had to be wiped (everything was backed up luckily) I brought it to a place by me to get repaired. I get it back and everything's fine except 2 issues:

My keyboard doesn't work anymore. Not that big a deal because I have another one I can use.

The main problem is that I can't turn up the volume past a certain point. I've turned the volume up as loud as possible in every option I can find but the audio from the speaker is not very loud at all.

The reason I mentioned the keyboard is that it had a volume control on it that I used and I'm not sure if that's some how related.

Anyone have any thoughts?