Question about HP Pavilion dv9720us Notebook

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Unknown device thank you very much for your solution ,I hope receive more solutions from you,I still have unknown device,device instance id is( ACPI\HPQ0007\2&DABA3FF&0) location on microsoft ACPI compliant system(code28) ,and I have another unknown device it called ethernet controller ,device instance id is(PCI\VEN-10DE&DEV-054C&SUBSYS-30CF103C&REV-A2\3&2411E6FE&0&50),location PCI bus 0,device 10,function 0 (code28), and the (OHCI compliant IEEE 1349 host controller)cannot start,I must tell you that I upgrade my computer to xp,thank you very much and I hope receive your answer as soon as possible

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  • 186 Answers

I beleive that you had downgraded and installed a retail version of XP by erasing the preinstalled version of Vista in your Notebook.
However, all the drivers required for your Notebook may not be available with HP if your Notebook is preinstalled with Windows Vista.
I recommend you to try downloading and installing the drivers for HP Quick Launch Buttons from the link below for the first Unknown device in the Device Manager :
ftp://ftp.hp.com/pub/softpaq/sp38001-38500/sp38266.exe

Save the file on to the Desktop or My Documents folder and double click once the download is completed to install the drivers.
For the Ethernet Controller, I recommend you to download the LAN Card Drivers from the link below :
ftp://210.51.181.211/cn/nic/INSTALL_VISTA_6208_0922.zip

Coming to IEEE 1394 controller, you need to download and install the Chipset Drivers which are available through the link below :
http://us.download.nvidia.com/Windows/nForce/15.24/15.24_nforce_winxp32_international_whql.exe

Make sure that you download and save the files in the Notebook and double click them once the download is completed and restart the Notebook after installing each of the drivers provided above.
Hope this helps...



Posted on Oct 06, 2008

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Usually, when you buy any hardware the drivers come along with it on a disc. If you lose the driver disc you can always download the necessary drivers from the manufacturer's website. But what do you do when you are not sure of the manufacturer of the hardware? Well now you will know what to do.

Open Device Manager (Control Panel>System>Hardware>Device Manager) The hardware whose drivers are missing will appear as Unknown device, so it's easier to locate the device. Right click on the unknown device and click on Properties. Under the Properties window click on Details tab and select Device Instance Id from the drop down box. You should see a code similar to this: PCI\VEN_8086&DEV_27DC&SUBSYS_30868086
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Try to go throw this tutorial and fix it your self

if you think you have a driver problem go trow this steps

  1. Open Device Manager (Control Panel>System>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it's easier to locate the device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this

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  6. Give me this codes i will post the link to your driver



I hope you find this information useful and if you need any further assistance,
please feel free to contact me and let me know. I hope this information was helpful...
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Here's something to try. In Device Manager, double-click the unknown device to open its properties. Click the Details tab. In the Property drop-down menu, choose Device Instance ID (or Device Instance Path for Windows Vista/7). You'll see a string of characters in the Value box.
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Go to the PCI Vendor and Device database here:
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This indicates that the sound drivers are missing from your computer. You will have to identify the sound card that is installed on your computer before proceeding with downloading the correct driver. To identify the sound card, follow the steps below (Assuming that you are using Windows XP)

  1. Open Device Manager (Right-click My Computer>Properties>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it’s easier to locate the device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this
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  6. The portion of the code highlighted in RED is the Vendor ID and the portion highlighted in GREEN is the Device ID. In this example:
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You should first check device manager for any issues with Network drivers.

Start--> Run --> devmgmt.msc

This command will launch "Device manager" window.

If you see a Yellow exclamation mark in device manager for NIC, follow the following steps to identify the card that is installed on your computer.

  1. Open Device Manager (Right-click My Computer>Properties>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it’s easier to locate the device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this
    PCI\VEN_8086&DEV_27DC&SUBSYS_30868086&REV_01\4&1E46F438&0&40F0
  6. The portion of the code highlighted in RED is the Vendor ID and the portion highlighted in GREEN is the Device ID. In this example:
    Vendor ID = 8086
    Device ID = 27DC
  7. Once you have obtained both the IDs, proceed to www.pcidatabase.com . There you can either search for the vendor from the vendor ID or directly get information about the device along with the vendor name by searching with the device ID.
After you find out the information about the device and the manufacturer of the device, you can visit the manufacturer’s website and download the corresponding device drivers.

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1 Answer

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The first issue is that you do not know what drivers to install. For this, you will have to identify the devices that are installed in your computer. To do this, follow the following steps:

  1. Open Device Manager (Right-click My Computer>Properties>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it’s easier to locate the device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this
    PCI\VEN_8086&DEV_27DC&SUBSYS_30868086&REV_01\4&1E46F438&0&40F0
  6. The portion of the code highlighted in RED is the Vendor ID and the portion highlighted in GREEN is the Device ID. In this example:
    Vendor ID = 8086
    Device ID = 27DC
  7. Once you have obtained both the IDs, go to www.pcidatabase.com. There you can either search for the vendor from the vendor ID or directly get information about the device along with the vendor name by searching with the device ID.
Once you know which device is installed in your computer. You can search for the driver and download & install the same.

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First you will have to check the device that is installed on your computer and then download the drivers for the same. Go through the following steps to install the drivers:

  1. Open Device Manager (Right-click My Computer>Properties>Hardware>Device Manager)
  2. The hardware whose drivers are missing will appear as Unknown device, so it’s easier to locate the device. In your case, it will be VGA device.
  3. Right click on the unknown device and click on Properties.
  4. Under the Properties window click on Details tab and select Device Instance Id from the drop down box.
  5. You should see a code similar to this
    PCI\VEN_8086&DEV_27DC&SUBSYS_30868086&REV_01\4&1E46F438&0&40F0
  6. The portion of the code highlighted in RED is the Vendor ID and the portion highlighted in GREEN is the Device ID. In this example:
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