Reseating pw for Hp 3785 printer

[Mesheddy]

Trying to connect my iPhone 6s to go deskjet ink advantage 3785 it asks for pw which I don’t know so would like to do a systems reset to factory default and then connect buy how to do that and how to find pw then there is an E3 on screen which I cannot solve

[Anand_Andy]

Hi @Mesheddy,

Welcome to the HP Support Community

I understand you are getting an error message E3 on your HP DeskJet Ink Advantage 3785 All-in-One Printer. Not to worry I will help you to get a resolution to resolve the issue.

An E3 error message indicates a Carriage Jam, 

To assist better:

• Was there any paper jam or carriage jam recently on the printer?
• Check if the carriage is moving freely or if you can move it manually.
• To get the password, you have to press the information button (i) once and it will print the password.

While you respond to that, Let's perform a power drain: 

• With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.
• Remove USB cable, if present.
• Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.
• Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord (This is important) and then plug back the power cord to the printer.
• Turn on the printer and wait till warm-up period finishes and the printer is idle

If the issue persists, then please follow the steps mentioned in this document: HP Printers - Carriage jam or E3 error

Hope this helps! Keep me posted. 

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