Dell OptiPlex 980 (Early 2010) - Manual (Page 60)

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Power Supply
Dell™ OptiPlex™ 980 Service Manual—Small Form Factor
WARNING: Before working inside your computer, read the safety information that shipped with your
computer. For additional safety best practices information, see the Regulatory Compliance Homepage at
www.dell.com/regulatory_compliance.
Removing the Power Supply
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the optical drive .
3. Remove the hard-drive bay.
4. Remove the heat sink .
5. Remove the data cable from the cable hook.