G15 5515, WiFi not working

My laptop's built-in WiFi adapter has stopped functioning, indicated by the disappearance of the wireless network icon from the system tray. I've attempted numerous troubleshooting steps, including network resets, the Windows troubleshooter, disabling and re-enabling the adapter in Device Manager, uninstalling and reinstalling the driver (though I'm uncertain if I completely removed all driver files during the uninstallation process), and manually searching for drivers online without success due to difficulty identifying the precise adapter model. I've also explored various solutions suggested online, but none have resolved the issue. Furthermore, contacting Dell support has been challenging due to regional limitations.

Specifically, I'm concerned about the possibility of residual driver files interfering with a clean reinstallation. If I uninstalled the driver without checking the "Delete the driver software for this device" box in Device Manager, how can I ensure a complete removal of all associated files? I'm also seeking guidance on accurately identifying the Wi-Fi adapter's exact model and version to obtain the correct driver from Dell's website, given that my laptop's service tag is available. Finally, considering the persistence of the issue despite extensive software troubleshooting, what are the most likely remaining causes, including potential hardware failures, and what further diagnostic steps can I take before considering professional repair?