Next, you will need to hook up your monitor and keyboard. Then, you are ready to test your motherboard. You don't need to hook up your hard drive or anything else. All we want to do is power up and see if everything is coming up on the motherboard as it should. On the AT case, I can just turn it on and the fan will power up and I know the power supply is working fine.
Jumpers are rows of pins that are used to change settings and close connections.
You should see a small label underneath them in white lettering on the motherboard. You simply close the connection with a small screwdriver. If the fan goes on, then the power supply is on. And then when you check your monitor, the thing should start booting up. The AT board is even easier because it doesn't have the jumper.