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Wifi password not accepted as correct by Brother printer

I have an MFC-7840W printer that has worked fine with a wifi connection in the past. I recently changed the wifi password, this time including an “!” in the password. When I enter the new password for the wifi into the printer, it tells me: “Press ok & enter.” No amount of button pushing makes it accept or do anything else, and the password field where I just entered the password becomes empty. It’s like it can’t save the password? I can get the printer to connect to Wifi if I create a no password wifi signal through guest wifi. The password protected wifi is 2.4 ghz so that is not the issue either, any thoughts?

When I go to enter it into the printer, I do the following:

Menu -> WLAN -> Search for SSID -> Select my 2.4 ghz wifi -> It asks me to enter the WPA password and I do -> Press ok -> receive notification on screen that says “Press OK & enter” -> I press ok, and the password I entered disappears.

UPDATE: The printer now also says “The printer is not responding” on the printer app on my computer when trying to print through the no password Guest Wifi to the printer where this connection has been accepted by the printer.



Computer: Macbook Pro with Brother software installed and firmware on the printer updated to the most recent.

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Hi @gracitymay ,

Perhaps special characters such as ! are not accepted for user IDs or passwords.

Did you try another password without any special characters, just upper and lower case letters and some numbers (see p.21-22 for limits on password length) to see if that worked?

If no good try resetting (see p.87) the Network Settings and then reconfiguring it again with passwords that don’t have any special characters in it.

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It is NOT looking for your wifi password. It wants your administrator password. Try “admin.” Then hop on your computer, type in the printer's IP address in your browser. According to Brother this will open your network admin dashboard where (hopefully) you can idk…print something. :)

It took hours to find any info on this. Pulling my hair out for my daughter’s Chromebook situation similar to yours.

Good luck!

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Print to FTP I think it is called. For whatever reason Chromebook and Brother don't have drivers that are compatible. Maybe Apple same?

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Nicole estará eternamente agradecido.
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