Cause: You installed the "HP PCL 6 V4" (simplified) driver instead of the "HP PCL 6 V3" (full feature).
Fix: Uninstall the V4 driver via Control Panel. Download the HP Universal Print Driver (PCL 6) version 7.0 or newer, which fully supports the M479fdw’s duplex unit.
A: Use the HP Print and Scan Doctor (free utility). Or manually: Go to Print Server Properties > Drivers > Remove. Then delete leftover files in C:\Program Files\HP\. driver hp color laserjet pro mfp m479fdw
A driver acts as the translator between your computer (Windows, Mac, or Linux) and your printer. Using the wrong driver can lead to: Cause: You installed the "HP PCL 6 V4"
Businesses with multiple HP printers often prefer the HP Universal Print Driver (UPD) over the model-specific driver. The UPD works with the M479fdw and offers: A: Use the HP Print and Scan Doctor (free utility)
To use UPD with M479fdw: Download HP UPD PCL 6 (64-bit) from HP. During installation, select "Manual" and enter the printer’s IP address. Note: You may lose some MFP-specific scan/fax buttons on the printer’s touchscreen—those require the model-specific driver.