Answer to "Replacing iSight/Bluetooth/Wifi (cable only)"Hi. I did fix my Laptop. My cable was ok. It was the connector on the main board that was damaged. I saw it with a magnifier. One pin was bend over the one on its right, creating a short circuit. The consequence was only the lack of BT. Fortunately, with a needle and a tiny microscope lenses (and a lot of patience) I finally got the pin back in place. Then I reconnected the cable to never disconnect it again and... Boom !! My BT is working again. So if anyone think his cable is damaged, please check your connector before disassemble your screen. Because this connector is not robust at all.
Answer to "Bluetooth unavailable after opened up the back"I think you are in the same situation as I do. There is a cable running from the logic board to the screen, along the optical drive bay. The connector to the logic board is realy not robust and may have been broken. You may try to disconnect it and look if there is any damage. If so you are in trouble becaus this cable is splitting in two at the bottom of the screen panel. One half goes to the Wifi/BT and the other is going to the camera. Why does my wifi not come up (the camera doesn't work either)?)