This is a machine purchased at Wal-Mart, and it runs Helena wonderfully.
Under Linux Mint 8 (Helena), all hardware on this machine worked out of the box EXCEPT Sound.
After reading The Ubuntu forum, I found this link http://ubuntuforums.org/showthread.php?t=1043568&highlight=snd_hda_intel+options+database
The basic notion is to alter /etc/modprobe.d/alsa-base.conf so that the sound driver is properly loaded.
Open a terminal, and copy/paste the following:
sudo gedit /etc/modprobe.d/alsa-base.conf
Tap enter and enter your password.
copy/paste the following lines to the end of alsa-base.conf, save and reboot.
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel
options snd-hda-intel model=hp-dv5
options snd-hda-intel enable_msi=1
You should have glorious sound from dead silence.
Hope this helps.