Dell OptiPlex 330 User's Guide - Page 205

6 Replace the computer cover (see "Replacing the Computer Cover" on page 207). NOTICE: To connect a network cable, first plug the cable into the network device and then plug it into the computer. 7 Connect your computer and devices to an electrical outlet, and turn them on. 8 Verify that the computer works correctly by running the Dell Diagnostics (see "Dell Diagnostics" on page 111). System Board Removing the System Board CAUTION: To guard against electrical shock, laceration by moving fan blades, or other unexpected injuries, always unplug your computer from the electrical outlet before opening the cover. CAUTION: The heat sink assembly, power supply, and other components may become very hot during normal operation. Be sure that they have had sufficient time to cool before you touch them. NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components. 1 Follow the procedures in "Before You Begin" on page 143. 2 Remove the computer cover (see "Removing the Computer Cover" on page 147). 3 Remove any add-in cards on the system board (see "Cards" on page 157). 4 Remove the processor and heat sink assembly (see "Speakers" on page 194). 5 Remove the memory modules (see "Removing Memory" on page 157) and document which memory module is removed from each memory socket so that the memory modules can be installed in the same location after the board is replaced. Mini Tower Computer Parts 205