If the hotkey app does not fix it, the issue lies within Lenovo's power configuration subsystem. Go to the official (lenovo.com).
If this article resolved your issue, consider sharing it with a colleague who might be struggling with dead hotkeys. And remember: in the world of ACPI drivers, patience and precise driver matching always win over guesswork. Acpi Fnbt0000 Driver
Here are some reasons why the Acpi Fnbt0000 Driver is essential: If the hotkey app does not fix it,
A misconfigured BIOS can hide the ACPI device. Acpi Fnbt0000 Driver