Located on the back of the printer, usually a 15-character string. Get the Current Firmware Version:

Unplug extra scanners or printers.

The printer should now be in forced download mode (light should be green/orange) to re-attempt the firmware flash.

Before proceeding, understand the following:

: Once the printer reboots, you must remove or cover the chip on the toner cartridge with tape for the reset to take effect. Essential Resources & Links

A command prompt window will open automatically, displaying a progress bar or text showing data transfer.

Enables the use of generic, chip-less compatible cartridges, significantly lowering running costs.

Resetting firmware/EEPROM may void any remaining warranty. Use at your own risk. Always keep a working copy of your current firmware before downgrading.

What is your (Windows or Mac) used for the connection?