Dell Precision 390 - Manual (Page 40)

40
Quick Reference Guide
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 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.
Light Pattern Problem Description Suggested Resolution