Fix Ml1660 V1.01.00.30.fls !!install!! Guide
If you forget to tape over or remove the chip after a successful hack, the printer may read the chip's serial number again and re-lock itself, requiring another flash cycle.
Before any fix, a known-good Ml1660 V1.01.00.30.fls must be obtained. Sources ranked by reliability: Fix Ml1660 V1.01.00.30.fls