Intel DH55HC manual Bios Error Messages, Front-panel Power LED Blink Codes, Type Pattern

Intel Desktop Board DH55HC Product Guide

Table 18. Front-panel Power LED Blink Codes

Type	Pattern	Note
F2 Setup/F10 Boot	None
Menu Prompt
BIOS update in	Off when the update begins, then on for
progress	0.5 seconds, then off for 0.5 seconds. The
	pattern repeats until the BIOS update is
	complete.
Video error (no add-	On-off (1.0 second each) two times, then a	For processors requiring
in graphics card	2.5-second pause (off), the entire pattern	an add-in graphics card
installed)	repeats (blink 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: .25 seconds on,
	.25 seconds off,
	.25 seconds on, .25 seconds off. This
	results in a total of 16 blinks.

BIOS Error Messages

When a recoverable error occurs during the POST, the BIOS displays an error message describing the problem. Table 19 gives an explanation of the BIOS error messages.

Table 19. 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.

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