Ok I have an A1181 Macbook that basically was't seeing the new installed hard drive. I was advised by someone via the Apple store to replace the hard drive/sata cable, so ordered a replacement cable via ebay. Once installed new cable, hard drive was displaying and ready to clone my system back on to the new hard drive via superduper. Midway through copying using superduper the new internal hard drive just disappeared. Every since the Macbook won't see to see the internal hard drive very well, sometimes it will be viewable via disk utillities but seem very slow. I've since taken the hard drive out and cloned my 10.6 system on to it and it boots fine via a usb caddie connected to the macbook. But as soon as I put the drive back inside the macbook, the macbook can't seem to read the drive. Whats the chances I have and bad 2nd sata cable? Or is there something else wrong with the macbook somewhere? Oh would a broken IR sensor cable cause any problems also? Any help would be greatfully.