Dell OptiPlex 390 Owner's Manual page 69

LED
Power Button
Problem
Description
Troubleshooting
Steps
LED
Power Button
Problem Description
Troubleshooting Steps The computer hardware is operating normally but the
LED
Power Button
Problem Description
Troubleshooting
Steps
Memory modules are detected, but a memory power
failure has occurred.
• If two or more memory modules are installed, remove
the modules, then re-install one module and re-start
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 only one
memory module is installed, try moving it to a different
DIMM connector and re-start the computer.
• If available, install verified working memory of the
same type into your computer.
BIOS may be corrupt or missing.
BIOS may be corrupt or missing.
A possible system board failure has occurred.
Remove all peripheral cards from the PCI and PCI-E
slots and re-start the computer. If the computer boots,
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