Today I recieved a new upper case on advice from support that this might fix the problem I`ve had with sound from my internal speakers since installing a new HD. I`ve reassembled but am still getting no sound. Can someone tell me what colour wire should be at each end of the speaker connection when plugged in properly? If the problem isn`t that I`ve connected the wrong way round, is it possible that the bottom connection or socket is damaged? Is it possible to replace this socket?