Hp Envy 4520 Error Code Flashing

[Jackmeister]

I turned my printer on today and the email address has changed to a default one, i have a vertical and horizontal line across the printer screen and its now flashing Errorcode 0XB800074C. I havent a clue whats happened... can anyone help with this? Thanks

[Raj1788]

@Jackmeister

Welcome to HP Forums, 

This is a great place to get support, find answers and tips to your technical queries.

I suggest you do a Hard Reset

(1) Turn the printer on, if it is not already on.

(2) Wait until the printer is idle and silent before you continue.

(3) With the printer turned on, disconnect the power cord from the rear of the printer.

(4) Unplug the power cord from the wall outlet.

(5) Wait at least 60 seconds.

(6) Plug the power cord back into the wall outlet.

NOTE: HP recommends connecting the printer power cord directly to the wall outlet.

(7) Reconnect the power cord to the rear of the printer.

(8) Turn on the printer, if it does not automatically turn on.

The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.

Wait until the warm-up period finishes and your printer is idle and silent before you proceed.

Update the firmware using this link: https://support.hp.com/us-en/product/hp-officejet-pro-8610-e-all-in-one-printer-series/5367603/docum...

If the issue persists, I have sent you a private message, for more details that cannot be shared in a public post.

Can you please check your inbox on the forums page for the private message.

Have a great day!