Dell Precision R5500 - Page 79

Light Pattern
Problem Description Troubleshooting
Steps
Diagnostic LEDs Power Button LED
supply button. If
it illuminates,
there could be a
problem with
the system
board.
• If the LED still
does not
illuminate, the
problem is with
the power
supply.
Memory modules
are detected, but a
memory power
failure has
occurred.
• If two or more
memory
modules are
installed,
remove the
modules, then
re-install one
module and re-
start the
computer. If the
computer starts
normally,
continue to
install additional
memory
modules (one at
a time) until you
have identified a
faulty module or
reinstalled all
modules without
error. If only one
memory module
is installed, try
moving it to a
different DIMM
connector and
re-start the
computer.
• If available,
install verified
working
memory of the
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