Dell OptiPlex GX270 - Manual (Page 157)

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 .
2. Run the Dell Diagnostics to identify a more serious cause.
3. Contact Dell for technical assistance.
yellow
green
green
yellow A possible floppy or hard drive
failure has occurred. Reseat all power and data cables and restart the computer.
green
green
green
yellow A possible USB failure has
occurred. Reinstall all USB devices, check cable connections, and then restart the computer.
yellow
yellow
yellow
green No memory modules are
detected. l Reinstall all memory modules and restart the computer.
l To eliminate the possibility of a faulty memory connector, remove all memory modules, reinstall one
memory module (if the computer supports a single module), and then restart the computer. If the
computer starts normally, move the memory module to a different connector and restart the
computer. Continue until you have identified a faulty connector or reinstalled all modules without
error.
yellow
green
yellow
green Memory modules are
detected, but a memory
configuration or compatibility
error exists. l Ensure that no special memory module/memory connector placement requirements exist.
l Verify that the memory modules that you are installing are compatible with your computer.
l If the problem persists, contact Dell .
yellow
green
green
green Other failure has occurred. l Ensure that the cables are properly connected to the system board from the hard drive, CD drive,
and DVD drive.
l Check the computer message that appears on your monitor screen.
l If the problem persists, contact Dell .
green
green
green
green The computer is in a normal
operating condition after
POST. None.
Code Cause
1-1-2 Microprocessor register failure
1-1-3 NVRAM
1-1-4 ROM BIOS checksum failure
1-2-1 Programmable interval timer
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 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 time tick