Dell Precision YT583 User Manual page 111

Light Pattern Problem Description
No memory modules are
detected.
Suggested Resolution
Reseat the memory
1
modules to ensure that
your computer is
successfully
communicating with the
memory (see "Memory"
on page 172).
Restart the computer.
2
If the problem still exists,
3
remove all the memory
modules and install one
memory module in
memory module
connector DIMM_1.
Restart the computer.
4
A message appears stating
that because your memory
is not paired, the system
will operate with reduced
performance and reduced
error-correction capability.
Press <F1> to boot to
5
the operating system.
Run the Dell Diagnostics
6
(see "Dell Diagnostics"
on page 123).
If the memory module
7
passes, shut down the
computer (see "Turning
Off Your Computer" on
page 139), 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.
Troubleshooting Tools
111