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Back-Panel Indicators
When you turn on your system, it performs a POST, which is a series of self-
diagnostic checks. A successful POST ends with a single beep that signifies
the start of normal operation. If the system fails to emit the single beep or
appears to stop responding during POST, a series of indicators located at the
rear of the computer can help you understand which POST test failed or
why the system stopped responding. These indicators communicate
problems encountered during POST only, not during normal operation.
CAUTION: Before servicing any components inside your computer,
see "Safety First—For You and Your Computer."
The indicator patterns described in the following table can help you
determine what to do to resolve the problem. If a problem resolution
requires you to remove the computer cover, refer to "Installing Upgrades" for
procedures you must complete before performing the suggested resolution.
If the problem persists after you perform the suggested resolution, contact
Dell for technical assistance.
Blinking yellow Solid green Voltage regulator
failure on the system
board.
Check the diagnostic
indicator codes to see if
the specific problem is
identified. Also, see
"System Board Problems."
Solid green and a
beep code during
POST
N/A A problem was
detected while the
BIOS was executing.
See "System Beep Codes"
for instructions on
diagnosing the beep code.
Solid green power
indicator and no
beep code and no
video during
POST
N/A The monitor or the
graphics card may be
faulty or incorrectly
installed.
See "Video Problems."
Solid green power
indicator and no
beep code but the
system locks up
during POST
N/A An integrated system
board device may be
faulty.
Contact Dell for
technical assistance.
Front-Panel Diagnostic Indicator Codes
(continued)
Power
Indicator
Code
Hard Drive
Indicator
Code
Cause Corrective Action