Hello, I have a MBP 13" 2010 where the old HDD was somewhat damaged. It could only boot up in safe mode and was very slow then. I bought a new HDD and HD cable. Installed the new HD cable and HDD, but when I booted up from Disk Utility it couldn't detect any HDD. Tried changing the HDD to the old HDD, but now it couldn't find the old HDD either and it couldn't even boot up in safe mode. So I don't really know what the problem could be?