Dell OptiPlex E1 - Manual (Page 41)

Drive Hardware Removal (Low-Profile Chassis): Dell™ OptiPlex™ E1 Systems
Drive Hardware | 3.5-Inch Diskette-Drive Removal | 5.25-Inch Drive Assembly Removal | Hard-Disk Drive Assembly Removal
Drive Hardware
3.5-Inch Diskette-Drive Removal
To remove the 3.5-inch diskette drive assembly, follow these steps:
1. Disconnect the DC power cable and the interface cable from the back of the diskette drive.
2. Press the (2) 3.5-inch diskette-drive assembly latches to the left to release the assembly.
3. Rotate the left side of the assembly up, and lift the assembly out of the chassis.
4. Remove the 2 drive mounting screws from the left side of the drive, and remove the drive from the bracket.
When you replace the 3.5-inch diskette drive, be sure that the mounting holes on the right side of the drive engage the 2 hooks on the bracket.
5.25-Inch Drive Assembly Removal