Dell OptiPlex 5055 Tower Owner's Manual page 75

NOTE: Amber LED blinking pattern : The pattern is 2 or 3 blinks followed by a short pause then X number of blinks up to 7. The
repeated pattern has a long pause inserted in the middle. Example 2,3 = 2 amber blinks, short pause, 3 amber blinks followed by
long pause then repeats.
Table 32. Diagnostic power LED codes
State
-
-
-
-
S1
S2
S3
State Name
-
-
-
-
RCM
CPU
MEM
Blinking Amber Pattern
2 blinks > short pause >
1 blink > long pause >
repeats
2 blinks > short pause >
2 blinks > long pause >
repeats
2 blinks > short pause >
3 blinks > long pause >
repeats
2 blinks > short pause >
4 blinks > long pause >
repeats
2 blinks > short pause >
5 blinks > long pause >
repeats
2 blinks > short pause >
6 blinks > long pause >
repeats
2 blinks > short pause >
7 blinks > long pause >
repeats
Problem Description
Bad Motherboard
Bad Motherboard, Power
Supply or Power Supply
cabling
Bad Motherboard,
Memory or Processor
Bad coin cell battery
BIOS Checksum Failure
Bad Processor
Memory failures
Suggested Resolution
Replace the motherboard
If customer can assist to
troubleshoot, narrow
down the issue with PSU
BIST Test, reseat cable.
If nothing works, replace
the motherboard, power
supply or cabling
If customer can assist to
troubleshoot, narrow
down the issue by
reseating memory and
swapping an available
known good memory.
If nothing works, replace
the motherboard,
memory or processor
If customer can assist to
troubleshoot, narrow
down the issue by
swapping a known good
coin cell battery if
available.
If nothing works, replace
the coin cell battery
System is in Recovery
Mode.
Flash latest BIOS version.
If problem persists,
replace the motherboard
CPU configuration
activity is in progress or a
CPU failure was
detected. Replace the
processor
Memory subsystem
configuration activity is in
progress. Appropriate
memory modules were
detected but a memory
failure has occurred.
Troubleshooting 75