Hi....I found this post way back from 2013 .

Originally Posted by texchar555 View Post
ok, heres the fix guys go to i/o run 54-03,06,09. this adds toner through i/o then toner refresh. I had the sme happen to me. I thought by replacing the dv unit i would fix it . wow i was wrong , now i got the other dv unit code gggrrrr. talked to km and they said run these i/o numbers.

Does anyone have any idea on this ...If so can u explain it step by step