Bootable HDD replacement
My MacBook's bootable HDD was 'dead'.
I spent some time before realizing that the MacBook would never boot (even from an OS X DVD) if the installed HD had not been formatted for a Mac.
1) I formatted the new HD on another Mac, connecting it as an external HD.
2) I removed the 'dead' HD from the MacBook and replaced it by the newly formatted HD.
3) I booted the MacBox using an OS X DVD.
4) I restored OS X on the new HD using Apple's via-Wifi recovery procedure.
Do not hesitate to use iFixIt to replace a HD.
If you don't have two left hands (actually I am left-handed :-) you should make it.
I received iFix parcel only two days after ordering it on the US site (I leave in Europe). The tools (screwdrivers) are of excellent quality.
500 GB 5400 RPM 2.5" Hard Drive
iPhone 3GS Replacement Battery
54 Bit Driver Kit