The "2021" distinction is important: later printer firmware updates or model revisions often require a newer version of the service tool. The 2021 release (often version 5.0.0 or 4.1.5) is known to work reliably with the , MB2120 , MB2040 , and similar MAXIFY models.

(If you want, I can provide the exact MB2140 service-mode button sequence and a concise step-by-step with commands.)

And somewhere in the depths of a forgotten 2021 service tool, a line of code waits for the next trusting soul who just wants to clear an error.