How to fix HP Smart Tank 515 E4 Error - (Encoder Strip Problem Solved).

Learn how to fix E4 Error Code and resume led flashing error of HP Smart Tank 515 Printer. This error occurs because of the damage/defective encoder strip issue. These can also applied in other HP Smart Tank Model like 510, 610, 615 Smart Tank Printer.
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Olá, obrigado por partilhar aula muito clara, mas para mim ainda não achei a solução, a minha é HP Smart Tank 515 e o erro apresentado é ! piscando e o botão power on/off piscando também, o que poderia ser?