Dell OptiPlex 745 - Manual (Page 52)

52
Quick Reference Guide
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.
No memory modules are detected. • If you have one memory module
installed, reinstall it and restart the
computer. For information on
reinstalling memory modules, see your
online
User’s Guide.
• If you have two or more memory
modules installed, remove the modules,
reinstall one module, 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.
• If the problem persists, contact Dell. For
information on contacting Dell, see your
online
User’s Guide.
Memory modules are detected, but a
memory configuration or compatibility
error exists. • Ensure that no special memory
module/memory connector placement
requirements exist.
• Verify that the memory modules that
you are installing are compatible with
your computer.
• If the problem persists, contact Dell. For
information on contacting Dell, see your
online
User’s Guide.
A failure has occurred.
This pattern also displays when you enter
system setup and may not indicate a
problem.
• Ensure that the cables are properly
connected to the system board from the
hard drive, CD drive, and DVD drive.
• Check the computer message that
appears on your monitor screen.
• If the problem persists, contact Dell. For
information on contacting Dell, see your
online
User’s Guide.
Light Pattern Problem Description Suggested Resolution