: If the version (V1.01.00.30) does not exactly match your printer's current firmware, the machine may stop responding entirely. Security Risks
The process of applying this fix is relatively straightforward but requires precision to avoid "bricking" the device: Fix Ml1660 V1.01.00.30.fls
Since the error specifically complains about version 1.01.00.30, you need to re-flash exactly that version. Newer firmware might not work. : If the version (V1
Connect your printer via USB and ensure no other USB devices (except a keyboard/mouse) are connected. Fix Ml1660 V1.01.00.30.fls
Requires connecting the printer via USB and "dragging" the .fls file onto a firmware uploader (like usbprns2.exe Compatibility High (Specific). Specifically designed for firmware version V1.01.00.30