Canon PIXMA E474 - Manual (Page 269)

If "TCP/IPv6" is set to "Enable", both IPv4 and IPv6 are enabled.
Press and hold Stop button and release it when Alarm lamp flashes 23 times.
IPv6 is disabled and only IPv4 is enabled.
If the problem is not resolved, redo setup.
• For Windows:
Use the Setup CD-ROM or follow the instructions on the Canon website.
• For Mac OS:
Follow the instructions on the Canon website.
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