226 Advanced Troubleshooting
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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.
7 If the memory module passes, shutdown
the computer, remove the memory
module, and 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 the
remaining modules are not defective.
8 When the defective memory module is
identified, contact Dell for a replacement.
NOTE: If necessary, the computer can
operate in debug mode until new memory
modules are installed.
System board failure has occurred. Perform the procedures in "System Board
Problems."
If the problem persists, contact Dell.
Light Pattern Problem Description Suggested Resolution
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