Hyundai MHD 201 p

do not have USB headphones connected, now, or it will fail ! (ask)
you forgot to NO SOUND FROM INTERNAL speakers.
not magically, XP is now dead. your PC runs XP or VISTA right
that are both dead now, MS does not support them,
that means if driver goes missing (lots of ways, no need guess them here) but are now gone, your PC cant get them from MS now because they (MS) shut down the PnP servers. (means no drivers)
VISTA went to NO SUPPORT spring 2017, a fact.
its and old PC, why not reload the OS, windows, from you original disks.? or try the F11 key ,at power on (recovery)?

this pc was made in the year 2007, and has some support still.
how lucky you, most this old HP drops support.totally.
HP does not sell install media this old though if F11 fails.
NOw your official support pages at HP next:
HP says it came with VISTA, is VISTA still there??? we cant help
you at ALL lacking that critical factor.
but lets pretend you did say VISTA. 32bit (click control panel, then pick system icon, read what you own there)
so click this. vista 32

https://support.hp.com/us-en/drivers/selfservice/compaq-presario-f700-notebook-pc-series/3548233/model/3682525
see that sound driver there,? sure, run this. driver intaller
from HP, this and only this works, Vista 32

sp39051.exe
that is all there is. on Conexant chips.(sound/audio)
for this PC, but do know that other driver must be good too or the sound chip can fail. (for sure the one marked "chipset")
reload them all but do not do
MODEM or BIOS
try the first 4 on that page. to get sound. working.

do not run XP drivers on Vista that is hopeless as can be.
did you know 99% of the drivers web sites you see
are full of virus or wrong drivers, or both.
do not use those.
use HP drivers.
the chip maker was bought out and no support now.
see what I mean by zero support for old things?
http://conexant.com/about/

Not only that but your PC can be virus infected and sound dead is the least of the worries.

try the drivers from this page:
http://www.emachines.com/support/drivers.html
select your model and operation system, download and install.

Eventually, reinstall the operating system and use drivers on this site.

The Fujitsu FMV-610NU2 is an old Windows ME system. I don't know where you can find drivers. You could try to force the installation of sound via control panel, system, device manager, there should be a device that has not installed. Select it, and try to select a sound driver for it.

Good Luck

I believe that this is the only available free copy on the web.

Is it of any use?

http://fordfcsd.wunderman.be/UK/Audio%20-%20Multimedia%20-%20Navigation/Audio%201/audio%20guide%201%20%28cg3508en%29%2001-2006.pdf

i have cyber acoustics headset and i cant hear anything but my Mic works, my sound is all fine, when i plug my headset out i can hear but when its plugged in, i cant hear anything.

Static could mean a few things.

Magnets on or near (tube TV's) the system could disrupt the signal.

Try plugging the speakers in one at a time with music going to the AUX in. Run through all your settings to make sure that nothing is abnormal.

If it's plugged into a powerstrip, try plugging it into your wall outlet.

201-762-6500 is their main number.

download new drivers from driver detective..
or click bharatgulati.blogspot.com.
i do hv 1 problem..
"iam getting yellow vertical lines at startup screen..the lines are moving.system hangs after few sec. & sometimes it works perfectly.cant even format the system as it hangs.help"

 http://service.us.panasonic.com/operman/findmanual.aspx?cat=AUD
This link is for multiple Panasonic sound devices.  I am not sure whether your models are on here, but have a look.

get proper drivers for the sound., if it is chipset try installing it from the express installer., also check in the bios onboard audio get enabled., remove all old drivers and reinstall it freshly., it will works

try installing the Audio driver.
If it does not solve your problem, then Operating System needs to be repaired..