Intel D510MO manual BIOS Front-panel Power LED Blink Codes, POST Error Messages

Intel Desktop Board D510MO Product Guide

BIOS Front-panel Power LED Blink Codes

The BIOS also blinks the front-panel power LED to signal status messages and error messages indicating certain recoverable errors that occur during the POST. The blink codes are listed in Table 18.

Table 18. BIOS Front-panel Power LED Blink Codes

Type	Pattern	Note
BIOS update in	Off when the update begins, then on for
progress	0.5 second, and then off for 0.5 second.
	The pattern repeats until the BIOS update
	is complete.
Video error	On-off (1.0 second each) two times, then a	When no VGA option ROM
	2.5-second pause (off); the entire pattern	is found.
	repeats (blinks and pause) until the system
	is powered off.
Memory error	On-off (1.0 second each) three times, then
	a 2.5-second pause (off); the 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: 0.25 second on,
	0.25 second off, 0.25 second on,
	0.25 second off. This results in a total of
	16 blinks followed by system shut down.

POST Error Messages

The BIOS also displays error messages on the video monitor when certain recoverable errors occur during the POST. Table 19 lists the error messages with a brief description of each.

Table 19. POST Error Messages

Error Message	Explanation
CMOS Battery Low	The battery may be losing power.
CMOS Checksum Bad	The CMOS checksum is incorrect. The 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.

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