Dell Precision 5860 Tower Service Manual page 135

● 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. System-diagnostic lights
Blinking pattern
Amber
1
1
1
1
2
2
2
System state
● S4
● S5
S0
White
1
2
5
6
1
2
3
Description
There is in Hibernate or Off state.
Working state
Various sleep states or No POST
Failure to POST
Problem description
TPM detection failure
Unrecoverable SPI Flash
Failure
EC unable to program i-Fuse
Generic catch-all for
ungraceful EC code flow
errors
CPU failure
System board failure (included
BIOS corruption or ROM
error)
No memory/RAM detected
Suggested resolution
Replace the system board.
Replace the system board.
Replace the system board.
Disconnect all power source
(AC, battery, coin cell) and
drain flea power by pressing
and holding down power
button for 3~5 seconds.
● Run the Dell Support
Assist/Dell Diagnostics
tool.
● 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.
Troubleshooting 135