How to connect a laptop hard drive to a desktop computer
To connect a laptop hard drive to a desktop computer you have to use a Laptop IDE Hard Drive
Adapter. You can easily find this adapter on the Internet for
$10-$15. This adapter is very handy if you want to scan a laptop hard drive for
viruses and spyware using antivirus software installed on a desktop PC,
transfer data from a laptop hard drive to a desktop computer or create a ghost
image from one hard drive to another. I also use this adapter if a laptop hard
drive has failed and I have to recover data from it.

When you connect a laptop IDE adapter, a desktop IDE cable and a
laptop hard drive to each other, make sure to connect pin 1 on the hard drive,
pin 1 on the desktop IDE cable to pin 1 on the adapter. On a desktop IDE cable
the side painted in red goes to pin 1.

On a laptop hard drive there are 2 groups of pins. One group has 43 pins and the other has 4 pins. The pin 1 is located on the side closer to the group of 4 pins.

After you’ve assembled everything together, connect the IDE cable to a desktop PC. Connect it to a free IDE connector on the system board. When you start the computer, you should see the laptop drive in BIOS and in Windows. You can treat this drive as a regular hard drive.

FYI Pinout:
