HP Pro SFF 400 G9 - Solving Audio Problems; Sound Cuts in and out; Sound Does Not Come out of the Speaker or Headphones; Computer Appears to be Locked up While Recording Audio

Solving audio problems
If the computer has audio features and you encounter audio problems, see the common causes and
solutions listed in these tables.
Sound cuts in and out
Use this information to troubleshoot the computer.
SolutionCause
Shut down all open processor-intensive applications.Processor resources are being used by other
open applications.
Sound does not come out of the speaker or headphones
Use this information to troubleshoot the computer.
SolutionCause
Double-click the Speaker icon on the taskbar, be sure that Mute is not
selected, and use the volume slider to adjust the volume. You can perform
this action with the touch-sensitive buttons on the front of the computer.
Software volume control is turned down or
muted.
Enable the audio in Computer Setup: Advanced > Built-in Device Options.Audio is hidden in Computer Setup.
Turn on the external speakers.The external speakers are not turned on.
Turn on and use headphones or external speakers, if connected, or
disconnect headphones or external speakers.
Headphones or devices connected to the line-
out connector mute the internal speaker.
Press the power button to resume from the Sleep state.
IMPORTANT: When attempting to resume from the Sleep state, do not
hold down the power button for more than 4 seconds. Otherwise, the
computer will shut down, and you will lose any unsaved data.
Computer is in the Sleep state.
Enable the internal speaker in Computer Setup. Select Advanced > Built-
in Device Options.
Internal speaker is disabled in Computer
Setup.
Be sure that the application has selected the correct audio device.Some applications can select which audio
output device is used.
Set the operating system to use the correct audio device.The operating system controls might be set
to use a different audio device as the default
output device than what is expected.
Computer appears to be locked up while recording audio
Use this information to troubleshoot the computer.
Solution
Cause
Before recording, be sure that there is enough free space on the hard
disk. You can also try recording the audio file in a compressed format.
The hard disk might be full.
Line-in jack is not functioning properly
Use this information to troubleshoot the computer.
Solving audio problems
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