I recently bought a macbook pro for parts off ebay, and there was a red dot on the superdrive, just trying to figure out if this is a water indicator of some sort (like on cell phones), like maybe this thing was water damaged? It looks like just a dot with a red permanent marker... I don't have a way of testing the drive at the moment, kind of scared to plug it into something if it's damaged...
Drive says "Super 857CA" on it, manufactured nov. 2006. It appears to be a factory recertified unit.
Thanks in advance!