Question about HP Pavillion s7420n PC Desktop

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I have lost all the audio on my desktop PC HP 511n. I have tried the troubleshooting advice provided by HP but to no avail. Can anyone help?

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Janem, due to the computer's age it would seem that HP no longer offers support.
I was looking to see if the audio driver, (Sound driver) was available from HP.
I am of the mind that downloading, and installing the sound (Audio) driver needed may be to no avail.

Uses the AC '97 codec made by Intel, and is probably integrated sound made by RealTek.

May not be the advice you're looking for, but I would suggest buying an inexpensive sound card, and installing it.
You need a PCI sound card.

This is one example;


1) Turn the computer on, ait until Windows has fully loaded. Install the CD disk that comes with the Sound Card, into the optical drive. (CD/DVD drive)
Load the software.
Once the software has loaded, you may be asked to Restart your computer.

Close all windows go back to your desktop screen.
Shut the computer down normally.

2) Unplug the computer from power. Advise disconnect the power cord FROM the surge protector, and Not the back of the computer tower. (Pulling the power cable out of the back of the computer {Power Supply actually), can cause a voltage spike)

3) Open the computer case:
Work on a table. (A bed or directly on a carpet floor is a HIGH area of Static electricity. Static can fry out (Short Circuit) the hardware components inside a Computer)

Remove all cables leading into the back of the computer tower.
If memory serves, looking at the back of the computer there is a single screw in the top middle, and one screw on each of the outside edges towards the bottom, to remove. 3 screws total. Philips head screws ( + )

The computer cover pulls forward, and comes off like a hood. The cover is a one piece affair of three sides. Top, left side, and right side.

Before you reach into your computer, observe Anti-Static Precautions.

Anti-Static Precautions:
Your body carries Static electricity.
Static WILL fry out (Short Circuit) the hardware components inside a computer.
Computer on a table, computer unplugged from power, computer case open.

TOUCH the metal frame of the computer case to relieve your body of Static.
Should you leave your computer in the middle of working on it, upon your return be SURE to Touch the metal frame again.
It is also a wise move to de-static yourself before handling computer hardware components, such as the Sound Card.
De-static before taking the Sound Card out of it's protective anti-static bag.

Inside the computer's motherboard you will see three long white PCI slots.
Two may be occupied, but one should be free.

Line up the Sound Card's gold plated contact pins on the bottom of the card, with the open available PCI slot. The outside end of the Sound Card that you plug your speakers into, lines up with an opening in the metal frame of the computer case.

For this age of computer there may be a metal slot cover that is removable, by removing a single Philips head screw.
There may not be.
The metal slot cover may be held in by two, or three tabs.

Removing the metal slot cover in this case is performed with a pair of pliers, and a flat tipped screwdriver. Use Extreme caution when removing this metal cover, as the edges can be quite sharp!
The flat tipped screwdriver is used to push in one side edge of the metal cover.

Then the tip of the screwdriver is used to pry the edge out a little more, where finally the pliers can grab the edge.
The pliers are used to work the metal cover back, and forth to break the metal tabs, that hold the cover, and remove it.

The Sound Card's gold plated contact pins are lined up with the PCI slot, and the card is pushed down into place.

A single Philips head screw is used to hold the Sound Card in place.
Replace the computer cover, plug the computer into power.
All cables are reattached to the computer, to include the speaker cables.
WAIT 1 minute, turn the computer on.

Posted on Oct 09, 2010

  • 4 more comments 
  • joecoolvette
    joecoolvette Oct 11, 2010

    Thank you for the rating janern, Most Kind!

  • janern Oct 11, 2010

    Thank you for your advice, it would seem that the only solution to my problem is to replace the sound card. Your input is appreciated.

  • Kevin Smith Nov 14, 2010

    Here is the link from HP for the drivers.

  • joecoolvette
    joecoolvette Nov 14, 2010

    Thank you kevin136759, most appreciated! As you can see from looking at the Product Specifications, either motherboard offered, (TriGem or Asus) uses the AC'97 audio codec. This is a standard codec for this era of computer. Windows XP has these drivers, therefore they are not offered by HP. (No Audio drivers listed) I assumed HP Support took the asker through the usual, Update Drivers, or Uninstall, and it was to no effect. It was then my contention that the Audio chipset on the motherboard was fried. Solution? Do not use the Integrated Audio, use an inexpensive Sound Card. To post a link: Copy and paste the URL into the Solution box. Copy it once more, then go to the bottom of the Solution box, and click on the Insert Link icon. (Yellow star) In the Insert Link box that comes up, put your mouse cursor after the // inhttp://, left-click once, then backspace it out. Paste the URL into the Insert Link box. Now go below, and click on Insert.

  • Kevin Smith Nov 14, 2010

    here is a link for the ac '97 codec register for free and download.

  • Kevin Smith Nov 14, 2010

    goto this link. '97 codec



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