Dell Precision T3400 (Late 2007) - Manual (Page 254)

254
Adding and Replacing Parts
7 Lift the fan release lever and slide the fan toward the back of the computer
to release it from the bottom and remove it from the computer.
8 Disconnect the control-panel cable from the I/O panel connector by
pulling with the cable loop.
9 Remove the front panel (see "Removing the Front Panel" on page 154).
10 Remove the drive panel (see "Drive Panel" on page 212).
11 If an optional sound card is installed, disconnect the cable from the edge
of the I/O panel.
12 If an optional IEEE 1394 cable is installed in the front port, remove the
cable from the front of the computer by following the instructions that
came with the connector.
13 Remove the mounting screw from the I/O panel.
14 Remove the I/O panel from the computer.
1 fan release lever 2 fan
1
2