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Beep Codes

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2. Ensure that the computer is off and not in a power management mode. If you cannot shut down the computer using the operating system, press and hold the.
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Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies
a problem. One possible beep code (code 1-3-1) consists of one beep, a burst of three beeps, and then one beep. This beep code tells you that the computer
encountered a memory problem.

If your computer beeps during start-up:

1.

Write down the beep code on the

Diagnostics Checklist

.

2.

Run the Dell Diagnostics (see

) to identify a more serious cause.

3.

Contact Dell for technical assistance (see

Contacting Dell

).

l

If the problem persists, contact Dell (see

Contacting Dell

).

Routine system activity preceding video
initialization.

Watch your monitor for on-screen messages.

A possible expansion card failure has
occurred.

1.

Determine if a conflict exists by removing a card (not a graphics card) and restarting the

computer (see

Cards

).

2.

If the problem persists, reinstall the card that you removed, remove a different card,

and then restart the computer.

3.

Repeat this process for each card. If the computer starts normally, troubleshoot the last

4.

If the problem persists, contact Dell (see

Contacting Dell

).

Routine system activity preceding video
initialization.

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Watch your monitor for on-screen messages.

The computer is in a normal operating
condition after POST.

NOTE:

The diagnostic lights flicker briefly;

they are turned off after the computer
successfully boots to the operating
system.

None.

Code

Cause

1-1-2

Microprocessor register failure

1-1-3

NVRAM read/write failure

1-1-4

ROM BIOS checksum failure

1-2-1

Programmable interval timer failure

1-2-2

DMA initialization failure

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1-2-3

DMA page register read/write failure

1-3

Video Memory Test failure

1-3-1 through 2-4-4 Memory not being properly identified or used

Dell Precision 490 Memory

1-3-2

Memory problem

3-1-1

Slave DMA register failure

3-1-2

Master DMA register failure

3-1-3

Master interrupt mask register failure

3-1-4

Slave interrupt mask register failure

3-2-2

Interrupt vector loading failure

3-2-4

Keyboard Controller Test failure

3-3-1

NVRAM power loss

3-3-2

Invalid NVRAM configuration

3-3-4

Video Memory Test failure

3-4-1

Screen initialization failure

3-4-2

Screen retrace failure

3-4-3

Dell Precision 490 Service Manual Download

Search for video ROM failure

4-2-1

Dell Precision 490 Bios

No timer tick

Dell Precision 490 Gaming