Dell OptiPlex GX270 - Manual (Page 79)

5. Disconnect any telephone or telecommunication lines from the computer.
6. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
7. Remove the computer stand , if it is attached.
8. Open the computer cover .
Removing a Hard Drive
1. Disconnect the power and hard-drive cables from the drive.
2. Press in on the tabs on each side of the drive and slide the drive up and out.
Installing a Hard Drive
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
IDE Serial ATA
1 hard-drive cable
2 power cable
1 tabs (2)
2 hard drive