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Table 19. Power LED summary
Amber LED state
Off
Off
Previous State
Blinking
Steady
Off
Table 20. Amber LED blinking failures
Amber LED state
2
2
2
2
Table 21. States Under Host BIOS Control
Amber LED state
2
White LED state
Off
Blinking
Previous State
Off
Off
Steady
White LED state
1
2
3
4
White LED state
5
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
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.
Troubleshooting
81
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