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Message: [QUOTE="hfcheung, post: 215256, member: 13674"] Hi all, Nice to meet you guys. I have a printer in my working company using clp770nd to print cheque which only use black color. Now the printer monitor said M and Y are low (may be due to washing/clearing). We first time facing it with a more than 5 years use of this printer because we only use black color. I just wonder if I only do the black color printing, will this printer keep working as normal even M and Y are complete run out or I must replace them in order to print anything? Thanks for support. [/QUOTE]