If the printer locks up with a solid orange alarm light when entering Service Mode, the mainboard may be permanently locked. This happens if unauthorized or modified reset software was previously used on the device. Important Maintenance Notice
The green power light will flash for a few moments and then stay lit continuously. The screen on the printer will remain completely blank. This confirms your MB2140 is successfully in Service Mode. Step 2: Downloading and Running the Service Tool canon mb2140 service tool 2021
The following steps represent a generalized approach. The exact interface will vary depending on the specific version of the tool you download. If the printer locks up with a solid