Dell OPTIPLEX 990 Service Manual download pdf (Page 74)

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Problem Description Memory modules are detected, but a memory configuration or

compatibility error has occurred.

Troubleshooting Steps

• Ensure that no special requirements for memory

module/connector placement exist.

• Ensure that the memory you are using is supported

by your computer.

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Problem Description A possible expansion card failure has occurred.

Troubleshooting

Steps

• Determine if a conflict exists by removing an

expansion card (not a graphics card) and restarting

the computer.

• If the problem persists, reinstall the card you

removed, then remove a different card and restart the

computer.

• Repeat this process for each expansion card installed.

If the computer starts normally, troubleshoot the last

card removed from the computer for resource

conflicts.

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Dell OPTIPLEX 990 Service Manual Page 74