There's at least one video which shows that scanning is blocked in the ink Brother MFC-J9950W https://old.reddit.com/r/mildlyinfuriating/comments/1arnpkc/broth

There's at least one video which shows that scanning is blocked in the ink Brother MFC-J9950W https://old.reddit.com/r/mildlyinfuriating/comments/1arnpkc/brother_printer_doesnt_let_me_scan_when_ink_is_low/ https://old.reddit.com/r/mildlyinfuriating/comments/1arnpkc/... I'm not sure how widespread is this. Usually lower-end models (the one without touchscreen or any screen at all) tend not to block scanning.