Hi,

I have a 2150cdn machine which has suddenly started printing the black as grey or feint black.  Other colours are fine as seen on the Color Test page.

The fuser has done 26k pages so well below the 50k life expectancy.  I've replaced the PHD unit a few times but the web interface shows it as being ok currently.

I tend to use remanufactured toners but haven't had any issues previously with them.  I tried a new black toner and still have the problem.

Any ideas on where else to investigate this please?