Dell Precision T1600 (Early 2011) - Manual (Page 67)

Light Pattern
Problem Description Troubleshooting
Steps
Diagnostic LEDs Power Button LED
illuminates, the
problem may be
with your
system board.
• If the LED next
to the switch
does not
illuminate,
disconnect all
internal and
external
peripherals, and
press and hold
the power
supply test
button. If it
illuminates,
there could be a
problem with a
peripheral.
• If the LED still
does not
illuminate,
remove the PSU
connections
from the system
board, then
press and hold
the power
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
• If two or more
memory
modules are
installed,
remove the
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