Replacing the pad is a hardware fix, but the printer will still display the error until the electronic counter is reset.
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Search Google for "Site:printerknowledge.com Canon Service Tool V3400" . Look for a post by a user with more than 500 messages. Download the attached ZIP, scan it, and follow this guide. Replacing the pad is a hardware fix, but
The interface looks like it was designed in 1998. Here is what you need: download canon service tool v3400 free - install
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