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System Codes and Messages: Dell™ Dimension™ XPS Txxx and Txxxr Systems
Reference
Diagnostic Codes • POST Beep Codes • System Messages
Diagnostic Codes
Your system is equipped with four diagnostic code indicators, which are labeled "A," "B," "C," and "D" on the back of the computer. Each of the
four indicators can be yellow, green, or off as shown in
the indicators flash during power-on self-test (POST). After the system starts, the indicators remain green to signify normal system operation.
If a malfunction is detected and the computer fails to start, the indicators display a code that identifies the problem. Write down the diagnostic code
displayed, and look it up in Table 1.
Table 1. Diagnostic Codes
Diagnostic Code
Table
1. When the computer is turned on or restarted and the system is functioning normally,
Definition
Power up default.
System board is receiving power,
but the BIOS is not executing.
Recovery mode from BIOS failure.
Corrective Action
Make sure that the system is
connected to an electrical outlet, and
then check whether the front-panel
power indicator (see
Controls and
Indicators) is on or off. If the power
indicator is off, check the
power
supply. If the problem persists, refer
to Chapter 7, "Getting Help," of the
Dell Dimension XPS Txxx and
Txxxr Systems Reference and
Troubleshooting Guide for
instructions on obtaining technical
assistance.
If the power indicator is on,
reseat the
microprocessor.
Remove all
expansion
cards. If the system still
does not start, refer to Chapter 7,
"Getting Help," of the Reference and
Troubleshooting Guide for
instructions on obtaining technical
assistance.
Set the
configuration jumper
to
Maintenance mode and restart the
system. Enter the
system setup
program
and ensure that the
microprocessor speed is set
correctly. Exit and save the setting.
Turn off the computer and reset the
configuration jumper to Normal mode,
and then restart the system.
Reseat
the
microprocessor.
Remove all
expansion cards
and restart the
system to determine if a resource
conflict exists. If a conflict exists,
resolve the conflict as described in
"Resolving Software and Hardware
Incompatibilities" in Chapter 5 of the
Reference and Troubleshooting
Guide. If the problem persists, refer
to Chapter 7, "Getting Help," of the
Reference and Troubleshooting
Guide for instructions on obtaining
technical assistance.
Set the
configuration jumper
to
Maintenance mode and restart the
system. Enter the
system setup
program
and ensure that the
microprocessor speed is set
correctly. Exit and save the setting.
Turn off the computer and reset the
configuration jumper to Normal mode,
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