monitor has no image
I unplugged everything from my computer because I needed to put the cover back on it, and then when I plugged everything back my screen was completely blank even though the computer was running. I actually have two ports for my monitor, and I've been using the new one, but now nothing shows up, except when I plug it into the old one, it works but the resolution and color is all messed up and you can't fix it. And there's this bubble that keeps saying new hardware installation for PCI device, only I tried that and it didn't work either. My sound isn't working either; it also has two ports. Isn't the old one not supposed to work when there's a new one?