Dell OptiPlex 3090 Small Form Factor Service Manual page 81

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