Canon CLC5151 Reference Manual page 59

If login authentication by a login service (SDL or SSO) is not set, and MEAP is
selected as the initial function in Common Settings (from the Additional
Functions screen):
The Start Up screen is displayed until the machine is ready to scan.
After the Start Up screen disappears, the MEAP Start Up screen is displayed.
You can press [ ] to switch to the Basic Features screen to use the Copy, Mail Box, etc.
functions even if the MEAP Start Up screen is still displayed.
Main Power and Control Panel Power
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