Dell Precision 390: Light Pattern Problem Description Suggested Resolution

Light Pattern Problem Description Suggested Resolution

No memory modules are detected. 1

Reseat the memory modules to ensure

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.

System board failure has occurred. Contact Dell for technical assistance.

For instructions on contacting Dell,

see your User’s Guide.

40 Quick Reference Guide