Dell Dimension L c Series, Reference And Troubleshooting Manual

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6-4 Dell Dimension Lxxxc Systems Reference and Troubleshooting Guide
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If you completed the basic speaker checks (refer to “Speakers” in Chapter 4) and sus-
pect a problem with a sound card, perform the following checks:
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Check for conflicts as described in “Resolving Software and Hardware Incompat-
ibilities” in Chapter 5.
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Reinstall the audio drivers that came with the sound card.
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Perform the expansion-card checks described in “Expansion Cards” at the begin-
ning of this chapter.
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In general, network malfunctions may be caused by the following problems:
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Wrong or incorrectly installed network interface controller (NIC) drivers
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IRQ conflicts
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Damaged RJ45 connector or patch cable
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Bad hub port connection
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Incorrectly installed or malfunctioning network card
NOTE: If you can connect to the network but are having problems accessing network
resources, contact your network administrator.
To troubleshoot a network card, perform the following steps:
1. Run the diagnostics for your network card as described in the documentation
that came with the card.
If the network card is not detected, go to step 3.
If the network card does not pass all the tests, refer to Chapter 7, “Getting Help,”
for instructions on obtaining technical assistance.
2. Remove the computer cover and rotate the power supply as described in
“Removing and Replacing the Computer Cover” and “Rotating the Power Supply
Away From the System Board” in Chapter 2.
3. Remove all expansion cards installed in the computer (refer to “Removing Expan-
sion Cards” in Chapter 2) except the network card to prevent a card that is
incorrectly configured from causing an interrupt or input/output (I/O) port
resource conflict.
4. Rotate the power supply back into position, replace the computer cover, connect
all external cables, and turn on the system.
5. Clear nonvolatile random-access memory (NVRAM) as described in “Clearing
NVRAM” in Appendix B.