+ 0 Votes NO Louis Graham September 2, 2013 at 7:37am PST you don't have to replace the rest of the cartridges. + 0 Votes Only if others run out thomaswee251 September 19, 2013 at 3:46am PST No, ofcourse you do not need. You only replace other cartridges when they runs out. + 0 Votes No simsk04 August 22, 2013 at 6:04am PST No, you don't have to replace the other 3 cartridges. + 0 Votes Only if they are low too tmalo627 August 21, 2013 at 2:20pm PST No need to replace the others if they still have toner in them + 0 Votes Doubt if you can print black only when running out of colour toners chdchan August 27, 2013 at 8:02pm PST In my experience, some printers (better ones) can still print black only when running out of colour toners.