Chapter 11 121TroubleshootingIf You Cannot Solve The ProblemIf you cannot solve the problem with any of the workarounds in this chapter, please contact the sellerof the machine or a Canon service representative.Canon support staff are trained to be able to provide technical support to satisfy customers.Before contacting a Canon service representative, confirm the following:z Product name: PIXMA MP450z Serial number: written on label at rear of machinez Details of the problemz What you tried to solve the problem, and what happenedCaution Attempts by customers to repair or take apart the machine will invalidate anywarranty regardless of whether the warranty has expired.Note If the machine emits any unusual sound, smoke, or odor, turn it OFFimmediately. Unplug the power cord from the outlet and contact the seller or aCanon service representative. Never attempt to repair or disassemble themachine yourself.