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
.
Summary of Contents for Vostro 420
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