Dell Precision R5400 (Mid 2008) - Manual (Page 30)

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Troubleshooting
– Ensure that the main power cable and front panel cable are securely
connected to the system board (see your Service Manual on the Dell
Support website at support.dell.com).
• If the power light is blinking amber, the computer is receiving electrical
power, but an internal power problem may exist.
– Ensure that the processor power cable is securely connected to the
system board (see your Service Manual on the Dell Support website at
support.dell.com).
• If the power light is steady amber, a device may be malfunctioning or
incorrectly installed.
– Remove and then reinstall the memory modules (see your Service
Manual on the Dell Support website at support.dell.com).
– Remove and then reinstall any cards (see your Service Manual on the
Dell Support website at support.dell.com).
• Eliminate interference. Some possible causes of interference are:
– Power, keyboard, and mouse extension cables
– Too many devices on a power strip
– Multiple power strips connected to the same electrical outlet
Beep Codes
Your computer may emit a series of beeps during start-up. The series of beeps,
called a beep code, can help you identify a problem with your computer.
If your computer emits a series of beeps during start-up:
1 Write down the beep code on the "Diagnostics Checklist" on page 70.
2 Run the Dell Diagnostics to identify a more serious cause (see
"Troubleshooting Tips" on page 44).
3 Contact Dell for technical assistance (see "Contacting Dell" on page 71).
Code Cause
1-1-2 Microprocessor register failure
1-1-3 NVRAM read/write failure
1-1-4 ROM BIOS checksum failure