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Typically, if you are getting a "device not found" error upon trying to install an audio device driver, there are a number of issues that could be going on at one time.
First: You may have the wrong device driver or version of the device driver for the device intended for. Check the hardware version number and verify on the website of the hardware device (the audio card if it is an independent audio card that is what you are referring to) what is the latest revision of the driver. Download the driver and install it.
Second: If your device is an external audio card, make sure it's fully inserted into the PCMIA slot (seriel port if being used). If so, then accomplish the following procedure: Power down your PC. Remove the Audio Card and reboot PC. Allow PC to recognize no audio card, then shut down PC and reinstall Audio Card. Reboot PC and install with new Audio Driver
One of the two steps above should rectify the problem. If it doesn't, then the last resort is to assume the Audio card is faulty if it's an external Audio card.
If you have an internal Audio card, then there can be a faulty portion on the sound portion of the motherbood, which then would require the entire motherboard to be replaced. But before you result to this, be sure you have the newest Audio driver for the Audio Codec and installed correctly.
Please keep in mind, Conexant is an OEM supported Audio Codec and you need to refer to the maker of the PC itself for driver support. I.E. it may be a Conexant Audio chipset installed in a HP PC. So, be sure you go the manufacturer website such as "HP" for the audio driver support.
You might have updated to an incompatible driver. Not all new drivers work on all devices. Realtek drivers for example often are incompatible with specific devices, where you need a driver from the PC manufacturer. The Realtek driver will install without problems though. Just no sound anymore after that.
Try rolling back you audio driver. Here are some things you can try: http://www.pcauthorities.com/pc-errors/no-audio-device-in-windows
PROBLEM PLACEMENT: All Products > MONITORS > Troubleshooting > Generic problem for all Compaq MONITORS
"AUDIO driver not found"
"...here i have not found my AUDIO driver?"
Just so I'm absolutely clear:
You need AUDIO driver(s)?
Does your motherboard have on-board sound?
Do you have a seperate audio card? If so, what's the exact make/model/series?
The reason I ask is because the manufacturer (HP) of your Compaq Presario 7500 only offers Monitor, Modem, and ROM software/driver packages. Nothing for audio specifically or any composite/all-in-one packages [http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=228&lc=en&dlc=&cc=us&lang=&product=94505].
Please post back with answers and/or clarification, and we can try again.
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