Intel NUC Kit NUC5PGYH, Technical Product Specification

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4 Error Messages and Blink Codes
4.1 Front-panel Power LED Blink Codes
Whenever a recoverable error occurs during POST, the BIOS causes the board’s front panel power
LED to blink an error message describing the problem (see Table 29).
Table 29. Front-panel Power LED Blink Codes
Type Pattern Note
BIOS update in progress Off when the update begins, then on for 0.5 seconds,
then off for 0.5 seconds. The pattern repeats until the
BIOS update is complete.
Video error
(Note) On-off (1.0 second each) two times, then 2.5-second
pause (off), entire pattern repeats (blink and pause)
until the system is powered off. When no VGA option ROM is
found.
Memory error On-off (1.0 second each) three times, then 2.5-second
pause (off), entire pattern repeats (blinks and pause)
until the system is powered off.
Thermal trip warning Each beep will be accompanied by the following blink
pattern: .25 seconds on, .25 seconds off,
.25 seconds on, .25 seconds off. This will result in a
total of 16 blinks.
Note: Disabled per default BIOS setup option.
4.2 BIOS Error Messages
Table 30 lists the error messages and provides a brief description of each.
Table 30. BIOS Error Messages
Error Message Explanation
CMOS Battery Low The battery may be losing power. Replace the battery soon.
CMOS Checksum Bad The CMOS checksum is incorrect. CMOS memory may have been
corrupted. Run Setup to reset values.
Memory Size Decreased Memory size has decreased since the last boot. If no memory was
removed, then memory may be bad.
No Boot Device Available System did not find a device to boot.