Arduino Uno Upload Issues

When I try to upload the example "Blink" to the board, the computer says "done compiling" however on the board the Orange LED on Pin 13 keeps blinking On and off.... Even attaching an extra LED to Pin 12 does't work.

Can someone please help me?

By the way, the ATMEGA chip was out of place so I used a screwdriver to put it back into place. <---- Could this be the problem?

Thanks.