no audio output

i have a h/p laptop running vista home. i run free roll poker games and have a timer on this machine, and i display it on tv,s through out the bars. i use a svideo cable for the picture and plug into headset jack for the audio. all was fine then all of a sudden no audio, tried different cables and different tv's nothing changed. only thing i can come up with is i updated vista with the sp-1 package,dont know if this is just a coincedence or not. sure could use some guidance

 

In Device Manager (right-click Computer and select Hardware) you could try rolling back the driver for the sound card but have a look in Control Panel first as it may just be that SP1 has reset sound output settings ...

 

thanks for the reply, but...... i went to device manager and right clicked computer and my options where scan for hardware and properties .. no help.
and i went to control panel but did not understand what to do.... more help would be great