My speakers won't give sound (Realtek HD Audio)?

To start off, I'll tell how it all happened. First, almost 3 months ago I bought a PCI Wireless card from newegg, it came in a week later and it was defective. I returned it for a new one and got it another two weeks later (Very slow shipping). It was working, but when I installed what was on the disk it came with, my HD Audio Manager went wacky and said I was plugging in and out audio devices. I just clicked OK on all of them. So I got good speeds but I realized I hadn't any audio coming from my speakers. The realtek HD audio was set to default playback device and both ports on the audio jack were securely in. It simply wouldn't work. A restart didn't fix it either. So I uninstalled and reinstalled the drivers for the PCI Wireless card a couple of times, restarting time after time just going through troubleshooting processes in hope that one would fix it. So during the process, after the first time of uninstalling I found the card defective again only giving 0.8Mb/s download speed just as the first defective card. Over the whole convoluted process I hadn't fixed my speakers, my mouse drivers broke so I had to put it into a different port, and I have another defective PCI wireless card. So my question is, how would I fix my speakers? The speakers are in my monitor and what it's usually named is Realtek HD Audio or something but now it's named High Definition Audio Device. Are there any fixes I can try? Or is more information needed? Thanks!