MX712 test pattern does not print the PGBK

[Robertj]

All other colours print but not black ,  it advises to replace toner which is new

[Michael]

Hello.

First, check to make sure that the bright orange tape has been removed from the top of the ink tanks. 

If the issue persists, try performing 1-2 deep cleanings to see if this will help.  Visit this link for details about this procedure.

[Robertj]

Thanks for info, have deep cleaned the PGBK tank a number of times and took the ink tank in to make sure it had been filled correctly and after all that the PGBK strip on the test pattern still doesn't print. I can print all other colors but not black?

[Michael]

Hello.

If the PGBK grid isn't printing after multiple cleanings have been done, the printer may need to be repaired for correction.  Please check your local listings for any electronic repair shops in your area.