Dv4-1428dx with win7 upgrade from Vista. No internal spkr audio.

dv4-1428dx with win7 upgrade from Vista. No internal spkr audio.
Headset audio is OK.
Speaker icon in system tray shows red "x" (no connection) unless headset is plugged in.
Device Manager only shows two "High Definition Audio Device(s)", nothing else.
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Hi:
Try installing the Vista driver from your notebook's support and driver page and see if that fixes the issue.
Paul

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