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Intel® NUC Boards and Kits
Blink Codes and Beep Codes

The power LED on the Intel® NUC will blink in a pattern if an error occurs during POST. Intel NUC products that include a front panel audio jack will also produce an audible beep pattern, which can be heard through headphones or speakers plugged into that jack.

See the table for the patterns and solutions.

Sequence/pattern Meaning Troubleshooting steps

3 blinks (3 beeps)

On-off (1.0 second each) three times, then 2.5-second pause (off).

The pattern repeats until the computer is powered off.

Memory error

Make sure you are using the correct voltage memory (1.35V or 1.5V) for your Intel NUC.

Other tips:

  • Remove and reseat the memory.
  • Make sure the contacts on the memory and the socket are clean.
  • Check for a faulty memory module by trying the memory in a known good system.

If the Intel NUC has two memory slots:

  • Try using just one memory module at a time, swapping it between the upper and lower memory slots.
  • Try using memory modules from the same manufacturer with the same part number and speed.

Continual blinks

Off when the update starts, then on for 0.5 seconds, then off for 0.5 seconds.

The pattern repeats until the BIOS update is complete.

BIOS update in progress This pattern is normal behavior. No action is needed.

2 blinks (2 beeps)

On-off (1.0 second each) two times, then 2.5-second pause (off).

The pattern repeats until the computer is powered off.

Video error (when no VGA option ROM is found)

This error is disabled by default in BIOS

16 on/off blinks (8 beeps)

.25 seconds on, .25 seconds off, .25 seconds on, .25 seconds off, for a total of 16 blinks.

Then the computer shuts down.

CPU thermal trip warning

Check that chassis ventilation holes are not blocked and unit has sufficient airflow.

This applies to:

Intel® NUC Board D33217CK
Intel® NUC Board D33217GKE
Intel® NUC Board D34010WYB
Intel® NUC Board D53427RKE
Intel® NUC Board D54250WYB
Intel® NUC Board DCP847SKE
Intel® NUC Board DE3815TYBE
Intel® NUC Board NUC5i3MYBE
Intel® NUC Board NUC5i5MYBE
Intel® NUC Kit D34010WYK
Intel® NUC Kit D54250WYK
Intel® NUC Kit DC3217BY
Intel® NUC Kit DC3217IYE
Intel® NUC Kit DC53427HYE
Intel® NUC Kit DCCP847DYE
Intel® NUC Kit DE3815TYKHE
Intel® NUC Kit DN2820FYKH
Intel® NUC Kit NUC5i3MYHE
Intel® NUC Kit NUC5i3RYH
Intel® NUC Kit NUC5i3RYK
Intel® NUC Kit NUC5i5MYHE
Intel® NUC Kit NUC5i5RYH
Intel® NUC Kit NUC5i5RYK
Intel® NUC Kit NUC5i7RYH
Intel® NUC Kit NUC6i3SYH
Intel® NUC Kit NUC6i3SYK
Intel® NUC Kit NUC6i5SYH
Intel® NUC Kit NUC6i5SYK

Solution ID: CS-034364
Last Modified: 05-Nov-2015
Date Created: 04-Jun-2013