Chapter 3: Troubleshooting Your Computer; Diagnostic And Power Led Codes - Dell OptiPlex 7040-Small Form Factor Owner's Manual

You can troubleshoot your computer using indicators like diagnostic lights, beep codes, and error messages during the operation
of the computer.
Topics:
•

Diagnostic and Power LED codes

• Diagnostic error messages
• System error messages
Diagnostic and Power LED codes
Table 1. Power LED states
Power LED light status
Off
Solid amber / blinking amber
Slow Blinking white light
Troubleshooting your computer
Possible cause
The computer is either turned
off or is not receiving power
or in Hibernation mode.
The second state of the LED
at power up, indicates that
the POWER_GOOD signal is
active and it is probable that
the power supply is fine.
Initial State of LED at power
up. Refer to the table below
for Blinking Amber pattern
diagnostic suggestions and
possible failures.
System is in a low power
state, either S1 or S3. This
does not indicate a fault
condition.
Troubleshooting steps
● Re-seat the power cable
in the power connector on
the back of the computer
and the electrical outlet.
● If the computer is plugged
into a power strip,
ensure that the power
strip is plugged into an
electrical outlet and is
turned on. Also, bypass
power protection devices,
power strips, and power
extension cables to verify
that the computer turns
on properly.
● Ensure the electrical outlet
is working by testing it
with another device, such
as a lamp.
● Remove and reinstall any
cards.
● Remove and reinstall
the graphics card, if
applicable.
● Ensure the power cable is
connected to the system
board and processor.
● Press the power button to
bring the computer out of
the sleep mode.
● Ensure all power cables
are securely connected to
the system board.
● Ensure the main power
cable and front panel
Troubleshooting your computer
3
27