No Audio on Dell Dimension E521

My audio shows that it is installed, but I get no sound out of it.
I ran: rpm -qa | grep pulse in terminal and this is what it shows:

pulseaudio-module-lirc-0.9.11-27.1
pulseaudio-utils-0.9.11-27.1
gstreamer-0_10-pulse-0.9.5-54.1
pulseaudio-module-bluetooth-0.9.11-27.1
pulseaudio-module-zeroconf-0.9.11-27.1
alsa-plugins-pulse-1.0.16-57.1
libpulse0-0.9.11-27.1
libpulsecore4-0.9.11-27.1
pulseaudio-module-x11-0.9.11-27.1
pulseaudio-esound-compat-0.9.11-27.1
libpulse0-32bit-0.9.11-27.1
pulseaudio-0.9.11-27.1
libpulse-browse0-0.9.11-27.1
libpulse-mainloop-glib0-0.9.11-27.1
pulseaudio-module-gconf-0.9.11-27.1
linux-gydg:/home/frank # rpm -q libasound2
libasound2-1.0.16-39.1
linux-gydg:/home/frank # uname -a
Linux linux-gydg 2.6.25.16-0.1-default #1 SMP 2008-08-21 00:34:25 +0200 x86_64 x86_64 x86_64 GNU/Linux
linux-gydg:/home/frank # cat /etc/modprobe.d/sound
Any help would be great. I am new to Linux, but a quick learner.

Try working your way through the openSUSE audio troubleshooting guide:
SDB:AudioTroubleshooting - openSUSE

Failing that, we need more information as to your hardware/software configuration and also as to what sound related applications/driver you have installed. So please, if that guide does not help, to provide more information, with your PC connected to the internet copy and paste the following into a gnome-terminal or konsole:

wget http://home.cfl.rr.com/infofiles/tsalsa && su -c 'bash ./tsalsa' 

when prompted for a password please enter your root password. Please try to accurately answer the question on the number of plugs/jacks on your PC (for example my PC has 3 i/o plugs/jacks). When the script completes it will pass you a URL. Please post that URL here.

Also, please copy and paste the following into a gnome-terminal or konsole and post the output here.rpm -qa | grep alsa
cat /etc/modprobe.d/sound

Once I have that information, I believe I may be able to provide helpful recommendation(s).

Also, on a different subject, you may find it useful to read up more on openSUSE Linux basic concepts:
Concepts - openSUSE