My Gateway laptop says my sound device is working properly, but the sound only works if headphones or speakers are plugged into the jack. how do i fix this?

uninstall audio driver and install it again.

Please get your sound driver here : www.gateway.com
www.opendrivers.com/.../notebook-gateway-free-driver-download.html
www.computing.net > ... > General Hardware > Sound Cards
Regards, Jay__fdv4

Make sure your microphone is not muted in the control panel, under sounds.

Download the soundcard driver HERE. Directly from Gateway.

Good Luck!!

if u look sound driver in device manager however it canot be stall.so look it in control panel in speaker sign if here is deam and we can not move any setting .it is instalation fault and not using proper driver. then we can say it is hardwere fault.

Make sure the audio cable is plugged into the MB properly.

Did you check the Device Manager, the audio driver, has it a yellow ? against it or is it OK and enabled? If it is has the MUTE button been ticked?
If it has a yellow ? against the audio driver then the correct audio driver was not installed. Go to the Gateway Support/download page to download the correct XP driver for your model laptop's audio device and install it.
If the sound still doesn't work check Device Manager to see if the driver was installed and working.

Did you download and install this particular driver from Gateway:

http://support.gateway.com/support/drivers/search.asp?ref=step&st=browse&platform=10022&model=10773&os=10954&type=10096

This is the specific Vista driver for your computer. If you have been trying others, your hardware probably will not work. Hardware compatibility is an issue with upgrading to Vista. You need to make sure you are getting the right drivers from the device manufacturer, and sometimes you might find none available.

TRY INSTALLING AN AC'97CODEC DRIVER FROM REALTEK.RICHARDM69

remove the first sound device, then restart your computer, to see if vista will see that item. you may need fresh vista drivers for this to work..