Acer Aspire 4520 Audio Not Working

No sound on Acer Aspire laptop fix [Solved] - Laptop

https://ccm.net/forum/affich-453131-no-sound-on-acer-aspire-laptop-fix#:~:text=Try%20going%20to%20Control%20Panel%3EAll%20Control%20Panel%20Items%3ETroubleshooting%3EHardware,it%20and%20the%20options%20should%20come%20up%20%3A%29

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Audio problem in ACER ASPIRE 4520

https://social.technet.microsoft.com/forums/windows/en-US/7a0e05df-4dc9-49bd-adbf-162c208527d2/audio-problem-in-acer-aspire-4520

Realtek Audio on Acer 4520 not working, help! - Windows 7 ...

https://www.sevenforums.com/drivers/29369-realtek-audio-acer-4520-not-working-help.html

Realtek Audio on Acer 4520 not working, help! Hi! I was working last Tuesday in the morning with my lap. In this moment, the audio was working. I left, and then at night it wasn't working. It says that there's no audio device installed. A friend of mine was checking it and he thinks it might be lacking UAA drivers.

Audio problem in acer aspire 4520. | Tech Support Guy

https://forums.techguy.org/threads/audio-problem-in-acer-aspire-4520.913657/

I have acer aspire 4520, with win XP installed. After reinstalling the windows the audio is not working, i have installed the realtek audio...

Acer aspire 4520 Audio problem | MajorGeeks.Com Support Forums

https://forums.majorgeeks.com/threads/acer-aspire-4520-audio-problem.205505/

1: unistall microsoft uaa bus driver for HD audio and kb888111 2: delete c/windows/system32/drivers/Hdaudbus and Hdaudio 3: unistall the realtek driver and reboot 4: cancel PCI driver when startup 5: install the realtek driver from Acer 4520 Driver Disc but it does not work , system cannt detect my sound device only system sound appears.