No Sound From Headphones; System Board Problems; Video And Monitor Problems - Dell OptiPlex 170L User Manual

If the tests complete successfully, the controller is functioning properly.
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If the problem persists, or if the tests do not complete successfully,
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Check for interrupt request conflicts —

No sound from headphones

Check the headphone cable connection —
Adjust the Windows volume control —
is turned up and that the sound is not muted.

System Board Problems

Fill out the Diagnostics Checklist
CAUTION: Before you begin this procedure, follow the safety instructions in the Product Information Guide.
Check the power supply cable connections —
1. Turn off the computer and devices, disconnect them from their electrical outlets, wait 10 to 20 seconds, and then remove the
computer cover.
2. Ensure that the power cables from the power supply are firmly connected to the connectors on the system board.
3. Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
Perform all checks in "Card Problems"
Perform all checks in "Keyboard
CAUTION: Before you begin this procedure, follow the safety instructions in the Product Information Guide.
Reinstall the battery
1. Turn off the computer and devices, disconnect them from their electrical outlets, wait 10 to 20 seconds, and then remove the
computer cover.
2. Remove the battery, wait 5 minutes, and then reinstall the battery.
3. Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
If the problem still exists,
CAUTION: Before you begin this procedure, follow the safety instructions in the Product Information Guide.
Replace the Memory Modules —
1. Turn off the computer and devices, disconnect them from their electrical outlets, wait 10 to 20 seconds, and then remove the
computer cover.
2. Replace the memory module(s).
3. Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
4. If the RAM count displayed does not correctly match the actual amount of memory installed in the computer,

Video and Monitor Problems

Fill out the Diagnostics Checklist
See "Resolving Software and Hardware
Ensure that the headphone cable is securely inserted into the headphone connector.
Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume
as you complete the following checks.
Problems"
contact Dell.
as you complete these checks.
contact Dell.
Incompatibilities."
contact Dell.