[NUC] NUC Won't Start, Power LED Blinks/Beeps Three Times During POST

3 blinks (3 beeps)

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

The pattern repeats until the computer is powered off.

Make sure you are using the correct voltage memory and type (DDR type) for your 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 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 NUC that has the memory modules soldered down on the board. If it does, it likely means the soldered-down memory may have failed. In this case, contact Asus Customer Support using the link below.