Disconnect the iSight, inverter, and left fan cables from the left side of the logic board.

Take care not to dislodge the EMI gasket on the silver iSight connector.

If you have a MacBook Pro 17" Model A1229, the iSight, inverter, and left fan cables have different composures and locations.

For model A1261, the fan cable is located in the same location as the model A1229, 5 o'clock to the fan. The iSight and inverter can remain connected. Lift the tape from the top of the fan and make sure to check the connections afterward.