My brother has a MacBook and when I turned it on there was only a folder with a question mark inside, so I realized the machine was looking for the hard drive.
I installed a new hard drive, but saw that the internal CD/DVD was not working. I attached an external CD/DVD drive through a firewire and I switched it on holding the option key. Then I got a grey screen with the Apple logo and the spinning circles, but then nothing happens.
I tried calling Apple support and they don’t have any answers. His Apple Care warranty has expired. Does anyone have any ideas how to revive this MacBook?