Solved - A1278 Can't install OSX
I took my macbook to the Apple Store - they fixed it in abut 2days. It was ribbon cable connecting MB and HD.
My configuration is A1278 with Vertex 3, 8GB RAM (Crucial) and original HD in an optibay.
I can't re-install OSX, every time I try it takes about 20min to even get into installer, and after that disk doesn't get unmounted, so it can be formatted.
I can install Ubuntu and any other Linux distro.. I just don't know what to do.
It all started when I tried to teach my girlfriend some PHP basics and started Dreamweaver, after that Macbook just beach balled. After forced reboot it couldn't pass the boot (stop sign after a lot of loading).
I tried verbose boot and it reported that it can't mount root device.
I tried and formatted old-original HD that comes with a Macbook - same problem.
I'm sorry for my English, I know that it's not the best :).
Is this a good question?