Canon PIXMA MG5500 series Online Manual page 153

The ink lamp is off.
The ink tank is not installed properly or the function for detecting the remaining ink
level is disabled. If the ink tank is not firmly in place, make sure that the orange
protective cap has been removed from the bottom of the ink tank, then press on the
top of the ink tank until the ink tank clicks into place.
If the ink lamp is still off after reinstalling the ink tank, there has been an error and
the machine cannot print. Check the error message displayed on the LCD.
A Message Is Displayed
Note
You can also check the ink status on the computer screen.
Checking the Ink Status from Your Computer
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