This is the most critical step. With the printer turned off , you must perform a specific key combination. While it varies, a common sequence is:
The Canon Service Mode Tool v1.050 (often listed as Service Tool.exe ) is an official or semi-official service utility developed for technicians to diagnose and maintain Canon inkjet printers. It is a small executable application designed to communicate with the printer's motherboard while the printer is in a specialized "Service Mode." Key Capabilities of v1.050 Canon service mode tool version 1.050
: Using the tool can potentially void your printer's warranty. Even worse, if you use the wrong version or execute a function incorrectly, you could "permanently brick a printer". The tool's "EEPROM Clear" function, for example, is irreversible and wipes critical data. Incorrect use of the wrong version can also cause the printer to lose access to service mode entirely, as one forum member warns for the TS5040. This is the most critical step