Datasheet

67
4 Board Status and Error Messages
4.1 Front-panel Power LED Blink and Internal
Speaker Beep Codes
Basic error and status messages are provided through the front-panel power LED blink
codes as well as through audible beep codes on systems with an internal speaker
connected to the internal speaker header. Blink/beep codes represent their respective
messages as shown in Table 39.
Table 39. Front-panel Power LED Blink and Internal Speaker Beep Codes
Type Pattern
CPU Initialization Beep and blink code: 0.1 second beep/blink within the first second after
pressing the power button.
Completion of POST Beep and blink code: 0.1 second beep/blink between POST completion and
boot device continuing the boot process.
BIOS update in progress Beep code: none.
Blink code: on-off (0.5 second each); pattern repeats until BIOS update is
complete.
Video error Beep and blink code: on-off (0.5 second each) two times, then 3.0 second
pause (off); entire pattern repeats (beeps/blinks and pause) until system is
powered off.
Memory error Beep and blink code: on-off (0.1 second each) three times, then 1.5
second pause (off); entire pattern repeats (beeps/blinks and pause) until
system is powered off.
Thermal warning Beep and blink code: on-off (0.5 second each) four times, then 3.0 second
pause (off); entire pattern repeats (beeps/blinks and pause) 16 times,
then ends.
4.2 BIOS Error Messages
Whenever a recoverable error occurs during POST, the BIOS displays an error
message describing the problem. Table 40 lists the error messages and provides a
brief description of each.
Table 40. 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.