Canon MG8100 series On-Screen Manual page 961

Check 1: Did you confirm the paper and print quality settings?
Print Results Not Satisfactory
Check 2: Check the status of ink tanks. Replace the ink tank if the ink
has run out.
Routine Maintenance
Check 3: Is the orange tape or protective film remaining?
Make sure that all of the protective film is peeled off and the L-shape air hole is exposed, as
illustrated in (A).
If the orange tape is left as in (B), pull the orange tape and remove it.
Check 4: Print the Nozzle Check Pattern and perform any necessary
maintenance operations such as Print Head Cleaning.
Print the Nozzle Check Pattern to determine whether the ink ejects properly from the print head
nozzles.
Refer to Routine Maintenance
Head Deep Cleaning.
If the Nozzle Check Pattern is not printed correctly:
Check to see if a particular color's ink tank is not empty.
If the Nozzle Check Pattern is not printed correctly though ink is sufficient, perform the Print Head
Cleaning and try printing the Nozzle Check Pattern again.
If the problem is not resolved after performing the Print Head Cleaning twice:
Perform the Print Head Deep Cleaning.
If the problem is not resolved after performing the Print Head Deep Cleaning, turn off the
machine and perform another Print Head Deep Cleaning after 24 hours.
If the problem is not resolved after performing the Print Head Deep Cleaning twice:
If Print Head Deep Cleaning does not resolve the problem, the Print Head may be damaged.
Contact the service center.
Check 5: When using paper with one printable surface, make sure that
for the Nozzle Check Pattern printing, Print Head Cleaning, and Print