No sound after graphics card installation.

[Carlos Garrido Soto]

Hi. First of all english is not my first language so I apologize for the mistakes.

My motherboard is an Acer WG43M and i had a broken graphic card nvidia geforce 315, so I bought a nvidia geforce gt 730, connected via VGA with my screen because i haven't got hdmi or dvi.
I'm not sure if the sound turned off after turning on the pc or after installing the drivers, but when i start the computer and the windows logo shows my speakers do a little noise and no more, although detects audio devices and the green bar go up and down when it has to.
I know there's a lot of post about this problem, but I tried every fix without solution. My audio setting are "enabled" on the BIOS, I uninstalled Nvidia audio drivers and installed realtek hd audio. My defauls audio device is "speakers".
I'm desperate, please tell me what I'm doing wrong .___.

EDIT: forgot to mention that I reinstalled w7 with my old graphic card and sound keep off

 

[IntelTurtleFan]

Check in the Nvidia sound panel option after drivers are up to date. It could have been switched after the installation.

 

[koffeeshop77]

you got to go in control panlal under sound and switch the default device to realtek hi def audio. then go to realtek hd audio manger and make it detects you devices when you unplug and plug them in, should be like a check mark box that asks you if you want to be promted everytime a new audio jack is pluged in very important! when you plug an audio jack in tell it front speakers out. you should have sound then.

it like the only thing you dont touch when installing a new system is the darn jackes

 

[koffeeshop77]

if you have front panal problem eg headphones could be that you unpluged the hd audio front out in while instllin graka, its usually it the way and can be forgoten to plug in bottom left corner of your board usally.