Dell Precision 390: Light Pattern Problem Description Suggested Resolution

Light Pattern Problem Description Suggested Resolution

A possible BIOS failure has occurred;

Run the BIOS Recovery utility, wait for

the computer is in the recovery mode.

recovery completion, and then restart

the computer.

A possible processor failure

Reinstall the processor and restart

has occurred.

the computer.

Memory modules are detected,

1

Reseat the memory modules to ensure

but a memory failure has occurred.

that your computer is successfully

communicating with the memory.

2

Restart the computer.

3

If the problem still exists, remove all

the memory modules and install one

memory module in memory module

connector 4.

4

Restart the computer.

The following message appears:

Alert! Operating in Debug

Mode. Please Populate

Memory in Pairs for Normal

Operation

.

5

Press <F1> to boot to the operating

system.

6

Run the Dell Diagnostics. See page 34

for instructions.

7

If the memory module passes, shut

down the computer, remove the

memory module, and then repeat the

process with the remaining memory

modules until a memory error occurs

during start-up or diagnostic testing.

If the first memory module tested is

defective, repeat the process with the

remaining modules to ensure that the

remaining modules are not defective.

8

When the defective memory module

is identified, contact Dell for a

replacement. For instructions on

contacting Dell, see your

User’s Guide

.

NOTE: If necessary, the computer can

operate in debug mode until new memory

modules are installed.

38 Quick Reference Guide