No audio device found - HP vs15 15"LCD Flat Panel Monitor

That statement might be true. The audio output device is hardware. If the hardware is present, go to control panel, hardware and sound, sound, audio devices... look for audio hardware, At that point, I like to delete any devices, then go to actions, search for new hardware. If found, windows will usually know what drivers the devices need. On some PCs you need to have a driver disk with special drivers If no hardware is found, you need to go to a PC repair shop or buy a book on PC maintenance and repair...I like the book, others like the repair shops, your choice.

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

if you have to audio driver cd get reinstall correct audio driver you problem to be solved

When you say about no audio device found, it means that the software of the said device are not installed. So you need to install the software you that the device will working.

I've had this problem before as well. You need to download the right driver, ie. Vista 32/64 bit, XP, Windows 7, etc. You should  be able to go to Sony.com and look up the right driver if you can find your model number. If you have any problems, repost and i can try to help some more.
Sean Huffstickler

Your sound drivers are not installed.

Well if you reinstalled the operating system you need to install the drivers for all the hardware that is on the motherboard, You need drivers for, chipset, Graphic's, sound, lan, If you go to the website
of the maker of your motherboard they will have all the drivers you need.

You have to reinstall your audio driver. Answers to your questions: 1. You can locate it in your Device Manager. Locate and expand Sound,video and game controllers. 2. You don't have to delete legacy drivers because reinstalling your audio driver will update it. Right click your audio software the one you found in the Device Manager and update it. It will find your installation cd of your system drivers. Else, manually install the audio driver.

*Drop me a comment if you still have questions. Your vote will be highly appreciated. Hope this helps you.

go to the device manager on your computer, and look at the Audio devices, and see if there is a yellow(!) next to anything, if not right click on the audio device, and select uninstall, say yes to all the prompts that follow, then reboot. When then computer boots back up it should show a found new hardware wizard, follow all of the on screen instructions and this should fix your problem.

is the sound device is built in to mainboard? if yes the you can download the driver of your audio here:
http://global.msi.com.tw/index.php?func=downloadindex

just input necessary data for the download.