A: No. Firmware is model-specific. An L6490 tool may brick an L6491. Always match the exact model.
Resetting the counter electronically does not fix the physical problem. If your counter is full, your physical waste ink pads are likely saturated with ink.
Since this is a text article, search YouTube for – look for videos uploaded in 2024 showing the Top interface (blue background, multiple tabs). Avoid videos with “Auto resetter” or “key generator” – they are scams.





