Chosen Solution

I followed the instructions to fix wobbly screen. Everything worked well. But when I switched the macbook on, i hear it startup but the screen stays blank. Could I have knocked something? Anyone have any ideas of what I should check? Thanks

Go back to step #8 and reseat the display data cable, examine the connector and the slot. Make sure the little lock tab that hold it in place will throw down. Hook it up to an external monitor to verify that the GPU is putting out a signal.