Lenovo ideacentre 200, Hardware Maintenance Manual, Page: 71 / 140

• If you are using powered external speakers that have an On/Off control, ensure
the following:
– The On/Off control is set to the On position.
– The speaker power cable is connected to a properly grounded, functional
ac electrical outlet.
• If your external speakers have a volume control, ensure that the volume is
not set too low.
• Some models have a front audio panel you can use to adjust volume. If you
have a front audio panel, ensure that the volume is not set too low.
• Ensure that your external speakers (and headphones, if used) are connected
to the correct audio connector on the computer. Most speaker cables are
color-coded to match the connector.
Note: When external-speaker or headphone cables are connected to the
audio connector, the internal speaker, if present, is disabled. In most cases, if
an audio adapter is installed in one of the expansion slots, the audio function
built into the system board is disabled. Therefore, you must use the audio
connectors on the audio adapter.
• Ensure that the audio device drivers are correctly installed. To download the
latest audio device drivers, go to http://www.lenovo.com/support and follow
the instructions on the screen.
Sound comes only from one external speaker
Solutions:
• Ensure that the speaker cable is inserted completely into the connector on
the computer.
• Ensure that the cable that connects the left speaker to the right speaker is
securely connected.
• Ensure that the sound level setting is set correctly.
Intermittent problems
Some problems occur only occasionally and are difficult to repeat.
Solutions:
• Ensure that all cables and cords are securely connected to the computer and
connected devices.
• Ensure that when the computer is on, the fan grill is not blocked (there is air
flow around the grill), and the fans are working. If airflow is blocked or the fans
are not working, the computer might overheat.
Chapter 7. Troubleshooting and diagnostics
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