Dell OptiPlex 755 Schnellreferenzhandbuch Seite 67

Power Light Problem Description
The computer is in a normal off
condition or a possible pre-BIOS
failure has occurred.
The diagnostic lights are not lit
after the system successfully
boots to the operating system.
A possible processor failure has
occurred.
Memory modules are detected,
but a memory failure has
occurred.
Suggested Resolution
• Plug the computer into a
working electrical outlet (see
"Power Problems" in the User's
Guide).
• If the problem persists,
contact Dell (see "Contacting
Dell" in the User's Guide).
• Reseat the processor (see
Processor information for your
system).
• If the problem persists,
contact Dell (see "Contacting
Dell" in the User's Guide).
• If two or more memory
modules are installed, remove
the modules (see "Removing
Memory" in the User's Guide),
then reinstall one module (see
"Installing Memory" in the
User's Guide) and restart the
computer. If the computer
starts normally, continue to
install additional memory
modules (one at a time) until
you have identified a faulty
module or reinstalled all
modules without error.
• If available, install working
memory of the same type into
your computer (see "Installing
Memory" in the User's Guide).
• If the problem persists,
contact Dell (see "Contacting
Dell" in the User's Guide).
Quick Reference Guide
67