Question about HP Pavilion dv4000 Notebook

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Sound distortion

My hp pavilion dv4000 has sound issues. programs run at normal rate and web pages load properly but any sound associated with these actions is distorted. i can't watch any videos, whether it be online or a dvd (the sound and picture has problems running smoothly). even when the computer is starting up, the startup sound is distorted. i need to solve this. i did a system restore once before and that worked but the problem came back pretty soon after. any ideas??

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  • justin_geryc Apr 14, 2009

    This led me to a few places. I lowered the sound acceleration. That seemed to help but there was still distortion. also, when i restarted my computer the acceleration level went back to the highest setting. I went to and updated the sound drivers which is why i restarted the computer. The distortion is still there. I'm really confused. my internet speed is fine. it's only when there is sound and video involved. could it have anything to do with processing? because it has distortion effect that sounds like 50 programs are running or something, even if only firefox is opened. thank you for your help. i'd like to hear what you think still.

  • justin_geryc Apr 14, 2009

    i have discovered that there are two devices under display adapters. apparently there should only be one. how do i know which one to delete? it says i can find the recommendations in my hardware documentation. but i cannot find that.

  • justin_geryc Apr 14, 2009

    these are GREAT suggestions. thank you for being so thorough. I'm going to to check on all of these things. I did slow the acceleration down already and that helped a little. I will also look into the other settings. You might be on to something with that. I think now that the two display adapters are in case I want to attach a second monitor or something. I will go work on this some more with your help. THANK YOU so much for this. I'm already a huge fan of this site and have only been using it for two days!

  • justin_geryc Apr 14, 2009

    HOLY ****!! The article was right I think. It said that that computer might be using "PIO" settings even though it said "DMA." I uninstalled the driver and it reconnected correctly. the sound is smooth as can be be now!!!! That took forever. thank you sooooooooooooooooooooo much.



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Try updating the drivers for your sound card. Online tutorials available at ms by searching your OS + update hardware drivers.
I'd also check at support for your notebook and see if there are any newer firmware releases for the sound installed on your system.

Posted on Apr 13, 2009

  • efs_perpends
    efs_perpends Apr 14, 2009

    You will be able to access the original specifications for your notebook by going to (click here) and looking up your product & model numbers in the support section of the site. These are found on the service tag attached to the bottom of your computer.

    • You should be able to merely disable one of the display adapters, without actually needing to delete it, at least until you're sure everything functions correctly without it. Check to see what adapter was installed new on your system and disable the other one, unless some kind of video card modification has been made to your system.

    • There could be a fault with your sound card, but there are steps you can take to troubleshoot the sound before that is determined. Make sure to check for updated drivers for your sound card by visiting your system manufacturer & the mfr of the sound device.

    • "If you have recently installed a new piece of hardware or a new expansion card, an IRQ (interrupt request line, communications route between the device and the CPU (central processing unit) or a DMA (direct memory access, a means of transferring data) may cause a conflict that interferes with your sound card."
    Because you are experiencing problems with all sound, I expect that you will discover some sort of conflict like this is the root of the problem...
    Please consult the article in this link and see if that doesn't fix your issue.

    If that doesn't work, here are some more generic tactics you can take:

    • I'm not sure what OS you are on, but begin by using the built in hardware troubleshooting wizard accessible from the Help & Support center. Open this from your start menu, choose hardware, then Fix a hardware problem, troubleshoot sound card, etc.

    • Make sure the speakers aren't the cause of distortion by plugging a headphone or alternate speaker into your computer and monitoring the sound.

    • Check all the obvious settings by going to the control panel for sounds & audio devices. Lower the input volumes from the advanced mixer control, make sure the correct speaker settings are applied, and reduce the hardware acceleration. Make sure you apply the changes.

    • If you have applied any kind of enhancement utility for your sound,
      like wow or DFX or some such, disable it. Open your default media player and set equalizer settings to

    • Is it possible the sound card is not inserted properly. Check to be sure it is seated firmly. If you added a sound card, make sure to disable the integrated audio for your system. See troubleshoot WMPsound

    • Defragment your hard drive. (A fragmented drive make it harder to stream data, including sound files.)
    Start with that list and see how you come out...Let us know how it goes!

    I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
    If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

  • efs_perpends
    efs_perpends Apr 14, 2009

    I'm really glad to hear your issue has been resolved!
    Best regards!



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My name is Vikram Kumar Thumu, from India-Hyderabad. I have seen your message on the issue . I would like to provide my suggestions on the issue. I hope that this should work for you and will resolve the issue.

well, the issue seems to be with Battery , it is not working properly any more. or it could be an issue with Battery drivers in PC.

To isolate the issue, I recommend you to try below steps. This will resolve the issue .

Step 1: Connect Battery and Also AC power adapter, try to charge the Battery for around 6 hours. Make sure that notebook is idle for 6 hours, do not try to run any application . Just let notebook be ON for 6 hours with AC power with Battery in, so that battery gets charged up.

Step 2 : Once if you are done with 6 hours of Charge, now disconnect the AC Power. Restart PC and let the PC run on Battery only. Check out how much time PC is able to run on battery. If PC powers ON properly with battery and runs around 40 minutes then it confirms that Battery is fine else if PC do not startup properly or if it works less than around 30 minutes on battery then it confirms that it is an issue with Battery. If found fault with battery then try step 3 process.

Step 3 :  To check Health of Battery

Please open below link in the new Internet Explorer. Copy and Paste the link at the address bar  and then click GO. This will open a web page that titles as " HP Notebook PCs -  Checking the Status of the Battery in Windows XP"

Link :

Once if you open web page, please perform the steps that are mentioned in web page as appropriate to your issue. I hope that this should resolve the issue.

If you need any further assistance on the issue, please mail me at I'll be glad to help you.


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