[Solved] HP scanner Not Working Quickly & Easily If you have all in one HP printer and if your HP scanner not working but printer is, then you should read this blog till the end, and you will be able to resolve HP Scanner is not working issue. Why My HP Scanner Not Working? There may be many reasons why your HP Scanner not working. Some of the common issues you may be facing like Computer not detecting scanner, pop error, or Scanner not scanning files. These are the most common errors of HP Scanner is Not Working faced by a lot of all in one HP printer users.