User manual

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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 31).
Table 31. Front-panel Power LED Blink Codes
Type
Pattern
Note
Power-on
Solid on primary color. Indicates S0 state.
Default to On; can be disabled
via BIOS Setup
S3 Standby
Blink alternate color .25 seconds on, .25 seconds off,
indefinitely. Indicates S3 state.
Default behavior; can be
changed via BIOS Setup
Intel Ready Mode Blink primary color, 1 second on, 1 second off,
indefinitely.
BIOS update in progress Off when the update begins, then primary color on for
0.5 seconds, then off for 0.5 seconds. The pattern
repeats until the BIOS update is complete.
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
Blink primary color .25 seconds on, .25 seconds off, .25
seconds on, .25 seconds off. This will result in a total of
16 blinks (blink for 8 seconds).
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.