System Lights; Diagnostic Lights - Dell OptiPlex SX280 User Manual

Yellow AC power is
present/no load
Green AC power is
present/power to load

System Lights

Your power button light may indicate a computer problem.
Power Button Light
Solid green
Blinking green
Blinks green several times and then
turns off
Solid yellow
Solid green and a beep code during
POST
Solid green power light and no beep
code and no video during POST
Solid green power light and no beep
code but the computer locks up during
POST

Diagnostic Lights

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
To help you troubleshoot a problem, your computer has four lights labeled "A," "B," "C," and "D" on the back panel. The lights can be amber or green. When
the computer starts normally, the patterns or codes on the lights change as the boot process completes. If the POST portion of system boot completes
successfully, all four lights display solid green. If the computer malfunctions during the POST process, the pattern displayed on the LEDs may help identify
where in the process the computer halted.
Light Problem Description
Pattern
off The computer is in a normal off
off condition or a possible pre-BIOS
off failure has occurred.
off
green A possible BIOS failure has
yellow occurred; the computer is in
yellow recovery mode.
yellow
yellow A possible processor failure has
green occurred.
The power adapter is connected to an
electrical outlet but not to the
computer.
The power adapter is receiving power
from the electrical outlet and is
properly connected to the computer.
Problem Description
Power is on, and the computer is operating
normally.
The computer is in the suspended state
(Microsoft® Windows® 2000 and Windows XP).
A configuration error exists.
The Dell Diagnostics is running a test, or a device
on the system board may be faulty or incorrectly
installed.
A problem was detected while the BIOS was
executing.
The monitor may be faulty or attached incorrectly.
An integrated system board device may be faulty.
Suggested Resolution
Plug the computer into a working electrical outlet and press the power button.
Run the BIOS Recovery utility, wait for recovery completion, and then restart the computer.
Reinstall the processor
the system for at least 10 seconds. Reattach the AC power cable to the power
supply. The light on the power supply should turn yellow. Reattach the DC
cable to the system. The light on the power supply should turn green.
Ensure that the power adapter is firmly connected to the computer and the
retention latch is engaged.
Reseat the power adapter cable to the computer.
Check the power button light and see the
Suggested Resolution
No corrective action is required.
Press the power button, move the mouse, or press a key on
the keyboard to wake the computer.
Check the diagnostic lights
identified.
If the Dell Diagnostics is running, allow the testing to
complete.
Check the diagnostic lights
identified.
If the computer does not boot,
assistance.
See "Beep Codes" for instructions on diagnosing the beep
code. Also, check the
problem is identified.
Check the diagnostic lights
identified. See "Video and Monitor
Check the diagnostic lights
identified. If the problem is not identified,
technical assistance.
and restart the computer.
"System Lights" table.
to see if the specific problem is
to see if the specific problem is
contact Dell for technical
diagnostic lights to see if the specific
to see if the specific problem is
Problems."
to see if the specific problem is
contact Dell for