Can I boot this up?

Hey all,

So I have a MacBook from 2009 and I was trying to put the key board back on to the device after a repair, unfortunately the keyboard refused to boot the computer up and when I tried to remove it to see what the problem was the connector on the keyboard came loos and disconnected from the board. In attempt to boot up the computer I located the power pads and booted it up though there and I was like “Oh ok good ill just leave the top case off and ill boot it up that way. After reassembling the computer I set a flathead drive to the pads and it made all the common sounds (hard drive spinning, optical drive doing its thing) and I received no input from the display (i’m using an external monitor as my main screen as the original is cracked). I unplugged it and plugged it back in and tried again. this time nothing happened. But the battery is charging and the light on the charger lights up, so now I'm lost as to how to boot the thing up and get feedback from the display.

Any help is much appreciated.