HP Pavilion FX75 User Manual page 37

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The message "Unknown Mode Detected"
appears on my display.
Your computer's display settings for screen
resolution and refresh rate are set to values that are
inappropriate for your FX75 display. See "FX75 Video
Modes" on page 35 for a table of supported modes.
I don't hear any sound coming from the built-in
speakers.
N Make sure the audio cable is plugged into the
speaker port on the back of the display and into
the speaker port on your computer.
N Make sure headphones are not plugged into
your system. If they are, sound goes to the
headphones instead of to the speakers.
N If your keyboard has volume controls, use them
to increase the volume.
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N Click the Volume icon on the taskbar. Drag
the Volume slider up to increase the volume.
Also, make sure the Mute box is not checked.
N If the speakers still don't produce sound or if
you can hear only a very faint sound, it's possible
that your sound card doesn't support passive
speakers. You need a sound card with amplified
sound output.
The image is very unstable.
N Set your PC to a supported video mode,
preferably 1024 x 768 at 75 Hz. See "Setting
the Video Mode" on page 13.
N Restore the original factory settings by
choosing Restore Factory Presets on the
OSD main window.
N Run the Auto Setup routine. See "Using Auto
Setup" on page 21.
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Troubleshooting