System Diagnostic Lights - Dell Vostro 5890 Service Manual

System diagnostic lights

Power-supply diagnostics light
Indicates the status of the power-supply in either of the two sates:
● Off: No Power
● On: Power is supplied.
Power button light
Table 20. Power button LED status
Power button LED state
Off
Solid White
Solid Amber
Blinking Amber/White
This platform relies on the Power button LED light blinking in an amber/white pattern to determine a failure as listed in the
following table:
NOTE:
The blinking patterns consists of two numbers (representing First Group: Amber blinks, Second Group: White blinks).
● First Group: The Power button LED light blinks Amber, 1 to 9 times followed by a short pause with LED off for a couple
of seconds.
● Second Group: The Power button LED light then blinks White, 1 to 9 times, followed by a longer pause before the next
cycle starts again after a short interval.
.
Example: No Memory detected (2,3). Power button LED blinks 2-times in Amber followed by a pause, and then blinks 3-times in
White. The Power button LED will pause for few seconds before the next cycle repeats itself again.
Table 21. Diagnostic LED status
Blinking pattern
Amber White
1 2
2 1
2 2
2 3
2 4
66 Troubleshooting
System state
● S4
● S5
S0
Problem description
Unrecoverable SPI flash failure
CPU failure
System board failure (including BIOS
corruption or ROM error)
No memory/RAM detected
Memory/RAM failure
Description
There is in Hibernate or Off state.
Working state
Various sleep states or No POST
Failure to POST
Suggested resolution
● Run the Intel CPU diagnostics
tools.
● If problem persists, replace the
system board.
● Flash latest BIOS version.
● If problem persists, replace the
system board.
● Confirm that the memory
module is installed properly.
● If problem persists, replace the
memory module.
● Reset the memory module.
● If problem persists, replace the
memory module.