If you no longer have the original Lenovo desktop case or model number, use (Mainboard tab) to read the motherboard model exactly (e.g., “N1996 (H81)”). Then search for drivers using a reference model like “Lenovo H530 drivers” — they are fully compatible.
Install the Realtek HD Audio driver. After reboot, test sound via the rear audio out. If the front panel headphone jack doesn’t work, open Realtek HD Audio Manager → go to Connector Settings → disable "Enable front panel jack detection". lenovo n1996 motherboard drivers
for community-sourced solutions regarding older "N1996" marked legacy hardware. Review the Microsoft Support Guide If you no longer have the original Lenovo