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Intel Desktop Board D2550DC2 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 15.
Table 15. BIOS Front-panel Power LED Blink Codes
Type
BIOS update in
progress
(Note)
Video error
Memory error
Thermal trip warning
Note: Disabled by default BIOS Setup option.
POST Error Messages
The BIOS also displays error messages on the video monitor when certain recoverable
errors occur during the POST. Table 16 lists the error messages with a brief
description of each.
Table 16. POST Error Messages
Error Message
CMOS Battery Low
CMOS Checksum Bad
Memory Size Decreased
No Boot Device Available
52
Pattern
Off when the update begins, then on for
0.5 second, and then off for 0.5 second.
The pattern repeats until the BIOS update
is complete.
On-off (1.0 second each) two times, then a
2.5-second pause (off); the entire pattern
repeats (blinks and pause) until the system
is powered off.
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.
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.
Explanation
The battery may be losing power.
The CMOS checksum is incorrect. The CMOS memory
may have been corrupted. Run Setup to reset values.
Memory size has decreased since the last boot. If no
memory was removed, then memory may be bad.
System did not find a device to boot.
Note
When no VGA option ROM
is found.
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