Dell Precision T5400 (Late 2007) - Manual (Page 129)

Troubleshooting Tools 129
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 "Diagnostics Checklist" on page 294.
2 Run the Dell Diagnostics (see "Dell Diagnostics" on page 136) to identify a
more serious cause.
3 Contact Dell for technical assistance (see "Contacting Dell" on page 295).
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
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