I've got a white Macbook, serial #: W8835 which I bought in September 2008. It had a problem with the backlight in September 2009, so I took it back to the retailer (Comet in the UK) and they replaced the screen and backlight (told me it all had to be replaced as it's a single unit). Well the new screen is defective and surprise surprise, the model # is: 00009C5B. My old screen didn't have this problem, but unfortunately I don't know what the model # is. I have been trying to get this fixed for over five months, but they keep saying there is nothing wrong with it and that two independent repair agents have confirmed this. What's more, they won't acknowledge any information in this thread or elsewhere on the internet unless it's direct from Apple. Here's a hint if you live in the UK: Do not buy from Comet, they are snakes.