A possible USB failure has
occurred.
No memory modules are detected.
Memory modules are detected, but
a memory configuration or
compatibility error exists.
Other failure has occurred.
The computer is in a normal
operating condition after POST.
Light Pattern
Problem Description
Beep Codes
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
2. Run the
Dell Diagnostics
to identify a more serious cause.
3.
Contact Dell
for technical assistance.
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
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
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
Search for video ROM failure
4-2-1
No timer tick
Reinstall all USB devices, check cable connections, and then restart the computer.
If you have one memory module installed, reinstall it and restart the computer. (see "Memory"
l
for instructions on how to remove and install memory modules.)
If you have two or more memory modules installed, remove the modules, reinstall one module,
l
and then restart the computer. If the computer starts normally, reinstall an additional module.
Continue until you have identified a faulty module or reinstalled all modules without error.
If available, install properly working memory of the same type into your computer.
l
If the problem persists,
l
Ensure that no
l
Verify that the
l
If the problem persists,
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Ensure that the cables are properly connected to the system board from the hard drive, CD
l
drive, and DVD drive.
Check the computer message that appears on your monitor screen.
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If the problem persists,
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None.
Suggested Resolution
Diagnostics
Checklist.
contact
Dell.
special memory module/memory connector placement requirements
memory modules
that you are installing are compatible with your computer.
contact
Dell.
contact
Dell.
exist.