This one looks more like a controller or cable issue rather than a broken substrate. Broken substrates almost always have some section that isn't exactly straight/parallel to side or bottom. There have been rare cases like this one where it is physical defect with the reader (rather than a broken substrate which is considered user error), thus it should be covered under warranty (which a broken substrate wouldn't be) and I believe Kobo has covered them. Unfortunately it sounds like getting warranty coverage is going to be a challenge for other reasons (shipping) for you. Good luck!
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