Dell OptiPlex 7070 Service Manual page 61

4. To remove the I/O panel:
a. Remove the screw that secures the I/O panel [1].
b. Rotate the I/O panel and remove it from the system [2].
c. Disconnect the hard drive data cable [3], optical drive data cable [4] and power cable [5] from the connectors on the
system board.
5. Disconnect the following cables from the connectors on the system board:
a. Intrusion switch [1]
b. CPU power [2]
c. Power switch [3]
6. Unroute the PSU cables from the retention clips [4].
Removing and installing components 61