Dell Precision R5500 (Early 2011) - Manual (Page 81)

Light Pattern Problem Description Troubleshooting Steps
Diagnostic LEDs Power Button LED
add the peripheral
cards back one by
one until you find
the bad one.
• If the problem
persists, the system
board / system
board component is
faulty.
Some other failure has
occurred.
• Ensure that the
display/monitor is
plugged into a
discrete graphic
card.
• Ensure that all hard
drives and optical
drive cables are
properly connected
to the system board.
• If there is an error
message on the
screen identifying a
problem with a
device (such as the
floppy drive or hard
drive), check the
device to make sure
it is functioning
properly.
• If the operating
system is
attempting to boot
from a device (such
as the floppy drive
or optical drive),
check system setup
to ensure the boot
sequence is correct
for the devices
installed on your
computer.
Beep Codes
The computer can emit a series of beeps during start-up if the display cannot show errors or problems. These series of
beeps, called beep codes, identify various problems. The delay between each beep is 300 ms, the delay between each
set of beeps is 3 sec, and the beep sound lasts 300 ms. After each beep and each set of beeps, the BIOS should detect if
the user presses the power button. If so, BIOS will jump out from looping and execute the normal shutdown process and
power system.
Code 1-1-2
Cause Microprocessor register failure
Code 1-1-3
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