Table 3. Power LED summary
Amber LED state
Off
Off
Previous State
Blinking
Steady
Off
Table 4. Amber LED blinking failures
Amber LED state
2
2
2
2
Table 5. States Under Host BIOS Control
Amber LED state
2
2
White LED state
Off
Blinking
Previous State
Off
Off
Steady
White LED state
1
2
3
4
White LED state
5
6
System state
S4, S5
S1, S3
S3, no PWRGD_PS
S0, no PWRGD_PS
S0, no PWRGD_PS, Code fetch
= 0
S0, no PWRGD_PS, Code fetch
= 1
System state
Bad MBD
Bad MB, PSU or cabling
Bad MBD, DIMMS, or CPU
Bad coin cell
System state
BIOS state 1
BIOS state 2
Notes
•
Hibernate or Suspend to Disk
(S4)
•
Power is off (S5)
System is in a low power state,
either S1 or S3. This does not
indicate a fault condition.
This entry provides for the
possibility of a delay from
SLP_S3# active to PWRGD_PS
inactive.
Boot Failure - The computer is
receiving electrical power, and
power supplied by the power
supply is normal. A device might
be malfunctioning or incorrectly
installed. Refer to the table
below for Amber Blinking
Pattern diagnostics suggestion
and possible failures.
Boot Failure - This is a system
fault error condition, including
the power supply. Only the
+5VSB rail on the power supply
is working correctly.
This indicates that the host
BIOS has started to execute and
the LED register is now writable.
Notes
Bad MBD - Rows A, G, H, and J
from table 12.4 of SIO Spec -
Pre-Post indicators [40]
Bad MBD, PSU or PSU cabling -
Rows B, C and D of table 12.4
SIO spec [40]
Bad MBD, DIMMS or CPU -
Rows F and K from table 12.4 of
SIO spec [40]
Bad coin cell - Row M of table
12.4 in SIO spec [40]
Notes
BIOS Post code (Old LED
pattern 0001) Corrupt BIOS.
BIOS Post code (Old LED
pattern 0010) CPU config or
CPU failure.
Troubleshooting
15
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