If you have an old laptop around that's seen better days, you can do a lot to repurpose it -- or you can just turn it into an all-in-one desktop. DIY enthusiast Oak's laptop wasn't in the best of shape, but he was able to flip the monitor around, add a stand, and turn the whole thing into a desktop PC with a keyboard and mouse.
You can build your own all-in-one PC with the right parts, but an old laptop can make a great one too -- if you don't need all the power of a new one.
Of course, if your laptop is so broken that its monitor doesn't work, you could always turn it into a PC-inside-a-keyboard. Hit the link to see more.