Dell Precision T7400 User's Guide - Page 115

- Ensure that the main power cable and front panel cable are securely connected to the system board (see "System Board Components" on page 27). 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 286. 2 Run the Dell Diagnostics to identify a more serious cause (see "Dell Diagnostics" on page 123). 3 Contact Dell for technical assistance (see "Contacting Dell" on page 287). 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- Memory not being properly identified or used 4 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 Troubleshooting Tools 115