Article ID: 000087669 Content Type: Troubleshooting Last Reviewed: 10/25/2021

Intel® NUC Won't Start, Power LED Blinks/Beeps Three Times During POST

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Summary

Troubleshooting tips for when you see 3 blinks on your power LED during startup.

Description

The power LED on the Intel® NUC blinks in a pattern if an error occurs during POST with On-off (1.0 second each) three times, then 2.5-second pause (off). The pattern repeats until the computer is powered off.

Resolution

Patterns and solutions:

Sequence/patternMeaningTroubleshooting 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 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.

It's rare that this blink pattern would appear on an Intel NUC that has the memory modules soldered down on the board. If it does, it likely means the soldered down memory has failed. In this case, contact Intel Customer support using the link below.

Disclaimer

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