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Lenovo Yoga 720

I have an HP officejet 7740.  I tried sending a fax from my computer today and I kept receiving a communication error.  HP  app no longer shows "fax" option but does show mobile Fax. The 7740 Fax printer no longer shows up under Printers & Scanners nor can I add it.  I have downloaded the Fax driver and installed it.  I have verified fax settings on the printer and I have power cycled both the laptop and the printer.  I am now desperate!  Please help me fix this issue.

I used this feature not longer than 30 days ago!  What happened?

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The additional issue I have is that FAX no longer shows in HP Smart, I can not locate FAX HISTORY.  This is a total mess

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