Dell OptiPlex 7040-Small Form Factor Owner's Manual page 28

Table 1. Power LED states (continued)
Power LED light status
Steady white
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 2. Diagnostic power LED codes
State
-
-
-
-
S1
28 Troubleshooting your computer
State Name
-
-
-
-
RCM
Possible cause
The computer is fully
functional and in the On state.
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
Troubleshooting steps
cable are connected to the
system board.
If the computer is not
responding, do the following:
● Ensure the display is
connected and turned on.
● If the display is connected
and turned on, listen for a
beep code.
Problem Description
Bad Motherboard
Bad Motherboard,
Power Supply or Power
Supply cabling
Bad Motherboard,
Memory or Processor
Bad coin cell battery
BIOS Checksum Failure
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.