HP Laptop HDMI Failure Due to Graphics Driver Issues

To confirm a driver-related cause, open the Windows Device Manager and expand the 'Display adapters' category. Examine the status of the graphics card (Intel, NVIDIA, or AMD); a yellow exclamation mark indicates a driver error or corruption. If the device is listed as 'Standard VGA' or is missing entirely, the installed driver is likely incompatible or corrupted. Further confirmation is achieved by checking if the HDMI output functions in Safe Mode, which isolates the hardware from high-level driver conflicts.