Canon imageCLASS 2200 Reference Manual page 242

1
Turn the main power switch off. Allow at least three seconds before
turning the main power switch back on.
OFF
( side)
ON
( I side)
2
If the machine still does not operate normally, follow the procedure
below, and contact your service representative.
Turn off the main power.
6
Disconnect the power plug.
6-32 Service Call Message