If the thing doesn't even give you the lovely little Compaq screen in the beginning, then it's definitely not a virus that caused this. If it does give you a compaq screen then it's one of two things:
A. Your windows just mucked up for whatever reason
or B. (Most likely), your harddrive is failing. You'll need a new one, and install it, and reinstall windows. (Generally expensive to have a tech do this for you) If B, go straight to my third answer.
First: Check to see if you can plug your laptop into an external monitor. See if you get a signal on there. If you do, your screen is broken. Probably a loose connector. This is really expensive repair (300+), get a new laptop or just use your laptop as a desktop.
Second: flip over laptop, take out battery, just try to run laptop with powercord. If you get absolutely no lights, then see if your power adapter is loose. If it is, it's your power supplyloose connector. You need to get it soldered back on. Call a local repair shop.
Third: There isn't much you can do from here. The best way to get your data off is either have a local shop do it for you (generally around the range of 100 bucks), or buy an adapter that reads harddrives, and hook it up yourself and transfer the data.