canon mp 640 wont print says its offline

The print menu does not allow one to print b&w only. Have tried to reduce the color bars in color options, but the Prixma MP 600 & 620 continues to print using colors ...

error message: unable to print troubleshooting and routine maintenance chapter in user's guide i cleaned the unit as per user's guide, but no change

error message: unable to print troubleshooting and routine maintenance chapter in user's guide i cleaned the unit as per user's guide, but no change

Hello, I've a problem with a printer Canon BJC-2100. When I turn it on, the print head moves in the middle and stops there, no matter the printer is connected or isn't connected to the computer. When I turn off the printer, the print head remains in the middle. What means this? The print head...