I just installed a new motherboard into my laptop since my old one decided to die on me. After putting everything together and trying to power it on, I was upset to find that there was nothing displayed on the lcd screen. It did power on though. So, I took it apart to double check everything and put it together once again. Now, it starts up, but nothing displays on the screen. The caps lock light blinks constintly, and its shuts down after a few seconds of powering on. What is wrong? I need this laptop for school. Please help.