Lexmark MS310
‑ On
If the printer control panel light sequence matches the light sequence in the preceding illustration, then do the following:
Check if both the toner cartridge and imaging unit are Lexmark‑authorized MICR (magnetic ink character recognition) or non-MICR supplies.
Change the toner cartridge or imaging unit so that both are Lexmark‑authorized MICR or non‑MICR supplies.
Notes: