MP450 User's Guide
Page 102
... the LCD. U161/ An ink cartridge that the correct FINE Cartridge is inserted in and turn the machine back ON. Printer error. If the same error occurs, contact a Canon service representative. See "Other Settings" on the Operation Panel except for a while. The machine may be recognized. After a ... one as soon as possible after printing has finished. The following ink may have not pressed [ON/OFF]. U140 The FINE Cartridge may have occurred. An error requiring servicing might have run out. Turn OFF the machine, and unplug the power cord of the machine from...
... the LCD. U161/ An ink cartridge that the correct FINE Cartridge is inserted in and turn the machine back ON. Printer error. If the same error occurs, contact a Canon service representative. See "Other Settings" on the Operation Panel except for a while. The machine may be recognized. After a ... one as soon as possible after printing has finished. The following ink may have not pressed [ON/OFF]. U140 The FINE Cartridge may have occurred. An error requiring servicing might have run out. Turn OFF the machine, and unplug the power cord of the machine from...