While holding , tap the STOP button 5 times rapidly, then release both buttons.

Upload the "System" and "Language" files. The machine's display should show a progress bar during this time.

"Download Standby" error on a Canon iR2016 indicates a corrupted or lost firmware (system software) state, effectively putting the machine in a "waiting for data" mode. This is not a standard paper jam or toner error; the printer's operating system has failed to load and must be reinstalled using specialized service tools. Core Cause: Firmware Corruption