IBM NetVista A20 User Manual page 80

3. Disconnect the power and signal cables from the back of the diskette drive.
4. Remove the two screws that hold the diskette drive to the mounting tray.
5. Open the door on the front of the computer.
6. Pull the diskette drive toward the front of the computer to remove it.
7. Reverse the procedure to install a new drive.
6-12 IBM Personal Computer User Guide