Beep codes – Dell OptiPlex 3010 (Mid 2012) User Manual

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If the operating system is attempting to boot from a device (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

Cause

NVRAM

Code

1-1-4

Cause

ROM BIOS checksum failure

Code

1-2-1

Cause

Programmable interval timer

Code

1-2-2

Cause

DMA initialization failure

Code

1-2-3

Cause

DMA page register read/write failure

Code

1-3-1 through 2-4-4

Cause

DIMMs not being properly identified or used

Code

3-1-1

Cause

Slave DMA register failure

Code

3-1-2

Cause

Master DMA register failure

Code

3-1-3

Cause

Master interrupt mask register failure

Code

3-1-4

Cause

Slave interrupt mask register failure