Using a Samsung CLP-680ND for black & white printing when color toner is low

My Samsung CLP-680ND Color Laser Printer suddenly reported a low color toner alert, and it brought the whole printer down--I was unable to print even black & white prints using the black toner.

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To keep the printer working even when toner is low, disable the "TonerLow Alert" by going to (Menu) > System Setup > Maintenance > TonerLow Alert on the control panel.

Also, I don't recommend buying random toner on eBay, even if you get something that looks genuine in the mail. I ordered Cyan, Magenta and Yellow toners from eBay, and when installed, the printer complains that they aren't compatible. Get the real stuff from a reputable dealer.

 This CLT-C506S, ordered from eBay, looks to be the right product (and the Amazon product page (https://amzn.to/2MLVjY2) says it will work), but my printer wouldn't recognize it.

This CLT-C506S, ordered from eBay, looks to be the right product (and the Amazon product page (https://amzn.to/2MLVjY2) says it will work), but my printer wouldn't recognize it.