The blacks never work.
The printers head and try aligning it first if this still continue try to self clean the windows system.
u put it in wrong
The blackink cartrudge was not seated in properly think that will fix your problem.
The blackink cartrudge was not seated in properly when you installed it take it is in properly think that will fix your.
The blackink cartrudge was not seated in properly when you installed it take it take it is in properly think that will fix your problem.
The blackink cartrudge was not seated in properly when you installed it take it out clean the blackink cartrudge was not seated in properly when you installed.
The printhead which is not working you can try using other printer.