Recent changes of hardware component such as the hard drive will affect your system since the previous drivers and configurations for other components were installed in your previous hard drive, thus likely your audio is not working. It is like introducing your new hard drive to the system by installing the audio drivers and/or other drivers that is needed to make them collaborate and work. So try to download and install the audio drivers which you can download from this link.
Click here: and follow these steps.
• select your region and language
• once directed to the next page enter your laptop serial number (check underneath the computer for S/N:) and click search
• it should display the drivers available for your computer
• scroll down and see the "Audio" section
• select the driver which is compatible with your system
• after downloading, the drivers run it and it will be installed into your system
This should fix the problem for your audio issues, hope this works.
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