Beep Codes - Dell Precision R5500 Owner's Manual

Light Pattern
Diagnostic LEDs

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
Cause
Code
Cause
Code
Cause
Code
Cause
Code
Cause
Code
Cause
Code
Cause
86
Power Button LED
1-1-2
Microprocessor register failure
1-1-3
NVRAM
1-1-4
ROM BIOS checksum failure
1-2-1
Programmable interval timer
1-2-2
DMA initialization failure
1-2-3
DMA page register read/write failure
1-3-1 through 2-4-4
DIMMs not being properly identified or used
Problem Description Troubleshooting
Steps
correct for the
devices
installed on your
computer.