Your Canon MB2140 uses ink to clean its printhead. That excess ink doesn't disappear; it drips down into a felt pad or sponge at the bottom of the printer called the "waste ink absorber." Canon programs the printer to count every purge, wipe, and nozzle cleaning. After roughly 5,000 to 8,000 pages (depending on usage), the printer assumes the pad is saturated. To prevent ink from leaking inside your office, the printer hard-locks itself.
In this rare state, software tools can no longer communicate with the board. The mainboard must either be replaced, or the physical EEPROM chip must be unsoldered, flashed manually via a hardware programmer, and soldered back on. The Physical Reality: Cleaning the Ink Pads
Every time your Canon MB2140 performs an automatic printhead cleaning cycle, primes new ink cartridges, or flushes ink to clear a clog, a small amount of ink is redirected away from the page. This excess ink is deposited into physical absorbing pads located at the bottom of the printer casing. Why Does the Printer Lock Up? Canon Mb2140 Service Tool
To save the changes into the printer’s permanent memory (EEPROM) and return to normal printing:
Disclaimer: Using service tools can void your warranty. Perform this procedure at your own risk. Your Canon MB2140 uses ink to clean its printhead
Connect the printer to a Windows PC using a high-quality . (Service Mode operations do not work over Wi-Fi).
: Triggering deep cleaning cycles that are more intensive than standard maintenance. How to Use the Service Tool To prevent ink from leaking inside your office,
When this happens, you cannot fax, copy, or print. The printer is effectively "bricked" until the counter is reset.