Dell OptiPlex 3020–Mini Tower Owner's Manual

Clearing CMOS

  1. Follow the procedures in Before Working Inside Your Computer .
  2. Remove the cover.
  3. Remove the PCI card if installed.
  4. Identify the CMOS jumper on the system board, see the System Board Components.
  5. Place the 2-pin jumper plug on pins 1 and 2 to clear CMOS
  6. Install PCI card if installed.
  7. Install the cover.
  8. Connect the computer to the electrical outlet and power-on the computer to clear the CMOS.
  9. Power-off the computer and disconnect the power cable from the electrical outlet.
  10. Remove the cover.
  11. Replace the jumper on the pins 1 and 2.
  12. Install PCI card if installed.
  13. Install the cover.
  14. Follow the procedures in After Working Inside Your Computer.
  15. Power-on the computer.

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