My scanner is now considered "Off-Line"!

[Koundog]

I have been using my HP Envy Photo 7855 All-In-One printer for the past 3 1/2 weeks daily, scanning and printing documents and emailing, and this evening I find I cannot scan because the screen says "Off-Line"! At first, it said it could not locate my scanner or printer. I went to the HP App store to download the printer app, but had no success. I am not the most literate computer user!

[Rainbow23]

Hi @Koundog,

Welcome to HP Support Community. This is a great place to post questions find answers.
Thank you for posting your query. I will be glad to help you.

I see that you are facing scanner offline issues with your HP Envy Photo 7855 All-In-One printer.

Please download and run the HP Print and Scan Doctor on the computer connected to the printer.
1. Download HP Print and Scan Doctor from this link: https://support.hp.com/us-en/help/printscandoctor 
2. Run HPPSdr.exe from the download location on your computer.
3. Once HP Print and Scan Doctor opens, click Start, and then select your printer.
4. If your printer is not in the list, turn it off and on and then click Retry.
5. If there is a connection problem, follow the instructions in HP Print and Scan Doctor.
6. If the screen displays prompting to turn on printer updates, click Yes and continue.
7. If the screen displays prompting to make your printer the default printer, click Yes and continue.
You may also refer to this document to know how to use HP Print and Scan Doctor.

Let me know if this helps and have a great day ahead.

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