Dell Precision 420 - Manual (Page 107)

Warning Messages
A warning message alerts you to a possible problem and asks you to do something before execution continues. For example, before you format a
diskette, a message may warn you that you may lose all data on the diskette as a way to protect against inadvertently erasing or writing over the
data. These warning messages usually interrupt the procedure and require you to respond by typing a y (yes) or n (no).
Diagnostics Messages
When you run a test group or subtest in the Dell Diagnostics , an error message may result. These particular error messages are not covered in this
section. Record the message on a copy of your Diagnostics Checklist . Also see " Getting Help " for instructions on obtaining technical assistance.
Diagnostic LEDs
Light-emitting diodes (LEDs) are located on the front panel and back panel of the chassis. These LEDs display diagnostic codes that can help you
troubleshoot a system problem. The following sections describe the meaning of the diagnostic codes.
Front Panel LEDs
Table 3 lists the codes for the front panel diagnostic LEDs, probable causes, and suggested corrective actions.
Table 3. Front Panel Diagnostic LED Codes
Back Panel LEDs
When you turn on your system, it performs a power-on-self-test (POST), which is a series of self-diagnostic checks. A successful POST ends with
4-4-3 Math-coprocessor test failure Run the System Board Devices tests in the Dell Diagnostics .
5-2-2-1 Mismatch RDRAM device count; unsupported
RIMM device count or technology Replace RIMM pair with supported matching device count.
5-2-2-2 Mismatch RDRAM technology or timing pair;
unsupported RIMM timing Replace RIMM pair with matching technology and timing.
5-2-2-3 RDRAM levelization failure Reseat RIMMs and C-RIMMs or replace faulty or unsupported RIMMs.
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary .
NOTE: Warning messages are generated by either your application programs or your operating system. See " Software Checks " and
the documentation that came with your operating system and application programs.
CAUTION: Before servicing any components inside your computer, see " Safety First —For You and Your Computer ."
Power LED Code Hard-Disk
Drive LED
Code
Cause
Action
Blinking yellow Off System power supply has
failed. See " Getting Help " for instructions on obtaining technical
assistance.
Blinking yellow Solid green Voltage regulator on the
system board has failed. See " Getting Help " for instructions on obtaining technical
assistance.
Solid yellow N/A A device on the system
board may be faulty or is
incorrectly installed. Be sure that each microprocessor is properly seated, remove all
expansion cards , and then reboot. If the system does not boot, see
" Getting Help " for instructions on obtaining technical assistance.
Solid green and a beep code
during POST N/A A problem was detected
while the BIOS was
executing. See Table 2 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. See " Troubleshooting the Monitor ." If the monitor is operating
properly and is correctly connected, see " Getting Help " for
instructions on obtaining technical assistance.
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. See " Getting Help " for instructions on obtaining technical
assistance.
NOTE: For the full name of an abbreviation or acronym used in this table, see the Glossary .