The **HP Smart Tank 580 E4 error** typically indicates a **paper jam or an obstruction within the printer’s paper path**. To fix this error:
1. **Remove any jammed paper** from the output and input trays carefully using both hands to avoid tearing[4].
2. **Check the paper path and printer components (including the print head area)** for any stuck pieces of paper, plastic components, or debris using a torch/flashlight for better visibility[2][4].
3. **Make sure the paper adjuster is properly positioned on the right side** to avoid feeding issues[2].
4. After clearing the jam and checking, **restart the printer and try printing again** to see if the error is resolved[4].
If the error persists, double-check that no foreign objects or parts are blocking the paper feed or print head movement. If needed, gently clean the print head assembly and confirm ink cartridge placement[2]. These steps are the recommended troubleshooting method for the E4 error on HP Smart Tank 580 and similar models in the series[2][4].