Dell OptiPlex 780

4. Remove the system cover.

Contents

Main Dell OptiPlex 780 Service Manual Mini-Tower Computer Notes, Cautions, and Warnings Page Working on Your Computer Dell OptiPlex 780 Service Manual Recommended Tools Before Working Inside Your Computer Turning Off Your Computer After Working Inside Your Computer Removing and Replacing Parts Technical Specifications Page Page Page Page Page Diagnostics Dell OptiPlex 780 Service Manual Dell Diagnostics When to Use the Dell Diagnostics Starting the Dell Diagnostics From Your Hard Drive Power Button Light Codes Beep Codes Diagnostic Lights Page System Setup Dell OptiPlex 780 Service ManualMini-Tower, Desktop, and Small Form Factor Boot Menu Navigation Keystrokes Entering System Setup Page Page Page Page Cover Removing the Cover Page Page Coin-Cell Battery Removing the Coin-Cell Battery Page Page Optical Drive Removing the Optical Drive Page Page Page Video Card Removing the Video Card Page Page Hard Drive Removing the Hard Drive Page Page Page Power Supply Removing the Power Supply Page Page Page Page Page Page Page Processor Removing the Processor Page Page Drive Cover Removing the Drive Cover Page Memory Removing the Memory Module(s) Page Floppy Drive Removing the Floppy Drive Page Page Page System Fan Removing the System Fan Page Page Page Page Page Page IO Panel Removing the IO Panel Page Page Page Page Page Page Page Heat Sink Dell OptiPlex 780 Service ManualMini-Tower Removing the Heat Sink Page Page Page System Board Dell OptiPlex Service ManualMini-Tower Removing the System Board