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Laptop sound not working. Tried many things already.

Last response: in Components
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Sony Vaio S, VPCSB28FJ
Windows 7 64-bit Home Premium
Audio: Realtek, Dolby

This problem occurred after I unattached the top section of the laptop.

Sound does not work even with volume maxed out.
I have tried connecting a working headphone to the unit and there is no sound to be heard on the headphone.
Volume icon has no red X on it and the volume bar (green bar) does jump when I click on the rocker in software.

The only time the sound works is when I connect a HDMI cable from the laptop to the TV.

I've already made sure the software/driver has been installed for this unit.

Yeah, the laptop motherboards are not inexpensive. If you are not confident you can replace it yourself you will pay about the price of a new one between the cost of the motherboard and paying someone to install it. The less expensive option is the sound card.
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