Fix Ml1660 V1.01.00.30.fls is a designed to override toner checks and revive bricked ML-1660 printers. Use it only if :
Below is an article covering what this file is, how it works, and how to use it. Fix Ml1660 V1.01.00.30.fls
Before applying any firmware fix, you verify your current firmware version. Applying a version .30 fix to a printer running version .34 or higher can "brick" the device (rendering it useless). Turn on the printer. Fix Ml1660 V1
To fix the ML1660 V1.01.00.30.fls file, follow these steps: how it works