(If you want, I can provide the exact MB2140 service-mode button sequence and a concise step-by-step with commands.)
Elias loaded the glossy paper into the rear tray. He hit print on the client's file. The sound of the printer rapidly firing ink onto the page was the sweetest music Elias had ever heard. canon mb2140 service tool 2021
A bead of sweat rolled down Elias's temple. If the connection dropped or the power failed now, the firmware could brick, turning the MB2140 into a pile of scrap metal. Canon MB2140 Service Tool 2021 — Solid Post
Cons:
Using the correct 2021 Service Tool can save an MB2140 from the landfill, giving an excellent printer a second life with just a few clicks. Purpose: Describe the Canon MB2140 Service Tool (2021