It's not only the keyboard that's the problem. If you have put a hard drive with an operating system installed into a different PC then all the motherboard drivers, graphics, sound, etc will be wrong. You just can't do this and expect it to sort out the drivers for itself. Also messing inside a switched mode power supply can be lethal. The fuse has blown for a reason so it's much better to just get another PSU and match the hard drive with its own motherboard.