Hello BHUVAN,
Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.
Thank you for the screenshots. It seems that your Microphone (input) is no longer detected on your laptop device. If the input settings say 'No devices found', it means that the required drivers for the Microphone are not installed properly.
You can try re-installing the drivers and check if it helps.
- Open Device Manager.
- Select the arrow next to Sound Video and Game Controllers.
- Right-click your generic audio driver (e.g. Realtek (R)), select Uninstall device, select the "Attempt to remove the driver for this device check box", and then select Uninstall.
- Once uninstalled, restart your PC.
After the system restarts, go to Settings > System > Sounds > choose your input device, and see if Microphone Array (Realtek (R)) is selected as the default input device. If selected, open the Windows sound recorder and test your input microphone.
If it still says no input device found, download and install the audio drivers from your PC manufacturer's website and check if it helps.
I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.
Best regards,
Gunasekar N