[clydec]

Hi again all and thanks for the help.

I'm sitting at my mother's computer and it's silent. It's an emachines desktop running Win XP Media Edition, SP3. No error messages or checks in the device manager. Volume is on and not muted in the volume control. She has a Realtek audio device manager. Speakers are plugged in correctly.

Any ideas what to check next?

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Front panel audio block on the motherboard.

[Neil Jones]

Front panel audio block on the motherboard.

[clydec]

Thank you.

Meaning what, exactly?

[Neil Jones]

Mean take the side of the case off and ensure it's still plugged in. Many boards with front audio panels fall silent if this either packs up or comes loose or anything like that.
Or more likely the sound has been disabled somewhere along the line, the speakers are defective or the PC's lost its sound driver. From what you've already said, try a new set of speakers.