Clearing CMOS on Intel® NUC

Last Reviewed: 31-Aug-2018
Article ID: 000005805

The CMOS is memory that is powered by a battery that holds all of the BIOS settings and real-time clock value.

Clearing the CMOS might resolve BIOS corruption issues that can prevent an Intel® NUC from starting, but it also causes any customized settings in the BIOS Setup to be lost.

  • Only clear the CMOS if absolutely needed. Before you start, make a note of all BIOS settings as they will be erased.
  • The date and time in BIOS must be reset after clearing the CMOS.
Intel® NUC Models Instructions
All other Intel NUC models
  1. When the Intel NUC is off, press and hold the power button for approximately 3 seconds, and then release. The Power Button menu should appear.
  2. Press F2 to enter Intel® Visual BIOS.
  3. Press F9 to restore BIOS factory default values.
  4. Press F10 to save and exit Intel Visual BIOS.
  1. Turn off all peripheral devices connected to the computer and disconnect the computer power cord from the AC power source.
  2. Remove the bottom chassis cover.
  3. Move the yellow configuration jumper from pins 1-2 to pins 2-3.
    Yellow configuration jumper
  4. Plug AC power back in and turn on the computer.
  5. The computer should automatically boot into BIOS Setup Maintenance Mode.
  6. Press F9 to restore BIOS factory default values.
  7. Press F10 to save and exit BIOS.
  8. Turn off the computer and disconnect AC power.
  9. Move the yellow configuration jumper back to pins 1-2.
  10. Replace the computer cover.
  11. Reconnect power and turn on the computer.

If clearing the CMOS doesn't resolve the no-boot issue, try the following:

Related topic
Troubleshooting BIOS Issues on Intel® NUC

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