konica minolta c351 writes c2251 error

[oluwatope333]

hi everyone, i have read several posts about bizhub c351 but i really have this issue unfixed yet,
my bizhub 351 konica minolta has been down for some times now, i have had to change the Cyan IU twice and i still have thesame issue, the cyan prints very faintly and writes c2551 error after printing about 5 sheets, i will really appreciate your support to solving this matter, thanks.

[copyman]

Are you sure the Cyan toner is adding? Is it genuine K/M toner? I would take the toner out and really shake well. Make sure opening where toner comes out is working properly. Also check toner motor.

Go into service mode and check toner %, if low than look for a tab in service mode to add toner and see if level % rises.

[oluwatope333]

i think i have tried out few things to put this through, i have cleaned the LPH assay, wipe cleaned the TCR sensor and even changed the developer. Is there any way to verify the compatibility of the toner from the machine, i got the toner from the store intact in its bag!