!!
critical HP
Error Code LED blinking with multiple Ink Alert lights fast blinking
A paper jam has occurred inside the printer.
? What Causes This
Paper is obstructing or causing jams within the printer mechanisms.
✓ How to Fix It
Remove jammed paper, clear any obstructions and attempt to resume process by pressing Resume button ( ). Reset if necessary.
Source: page 7 of the official manual
From the manual
This error code appears in:
HP Deskjet Ink Advantage 2135 All IN One Printer