I hooked up a 1.x usb cable from my printer to a 1.x usb hub to a 2.0 hub on my monitor to my computer's 2.0 usb port. I printed something and it worked. 10 minutes later my computer shut off completely. I took out my psu and it smelled like it was burned. So I bought a new psu and just installed it. But the computer will still not turn on. Any ideas?