Freezes on Startup

Hi, I'm new to the forum, and I have a question. I have an MSI Wind that I've been using as a hackintosh (using osx86) since January. Today when I opened my computer, it was frozen, so I shut it down manually with the power button. Now, when I try to turn it back on, it freezes on the white screen with the gray Apple logo. I can boot it fine in Windows, but multiple attempts to boot in OSX have ended the same way. The only thing I've recently changed is the wireless card. I was using the stock Realtek card, but a week and a half ago, I changed it to the Dell 1510 and it's been working fine until today. Anyone have any ideas as to what might be going on?