Dell Dimension 2100 - Manual (Page 20)

3. Secure the drive to the front of the computer frame with the two screws you removed.
4. Connect a power supply cable and the hard drive interface cable to the new drive.
Power Supply and Fan Assembly
To remove the power supply and fan assembly:
1. Disconnect the AC power cable from the computer.
2. Remove the computer cover .
3. Rotate the power supply away from the system board.
4. Disconnect the DC power cables from the POWER and OPTIONAL POWER connectors on the system board .
5. Disconnect the DC power cables from all the drives.
6. Press the power-supply retaining clips and lift the power supply and fan assembly out of the computer.
Control Panel
To remove the control panel:
1. Remove the front cover .
2. Disconnect the control panel from the system board.
3. Press the mounting tabs to release the control panel and remove the control panel assembly.
Cards
1 Power-supply retaining clips
2 Power supply and fan assembly
1 Control panel assembly
2 Mounting tabs