Question about Brother MFC 7840W Printer

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Brother MFC-7840w wireless printer won't connect to network

I have a Brother MFC-7840w wireless printer. I'm trying to connect to a 2wire wireless router. In the setup wizard on the printer control panel it detects my wireless network, says connecting, then gives the connection NG message. I contacted Brother support, they pointed the finger at my 2wire router (which kind of made sense considering the printer could see my network) so I called at&t (uverse) support and they pointed the finger right back at Brother. I'm hesitant to make changes on my router firewall without knowing more about what I'm doing...do you think it's simply my router firewall?...I have a desktop hardwired to the router using a powerline connection, a wireless laptop, and an apple itouch. Neither of my wireless devices had any trouble accessing my network...just the printer....
any assistance would be appreciated. Thank You.

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  • handymanbill Aug 24, 2008

    Ditto "I too have a Brother MFC-7840w wireless printer. I'm trying to connect to a 2wire wireless router. In the setup wizard on the printer control panel it detects my wireless network, says connecting, then gives the connection NG message." Prior to purchasing Brother wireless printer I tried using a wireless print server on a HP Laserjet 3050 printer and had problems with it ....connecting. Son came over and spent 3 hours getting it to work. So when the Uverse encountered another problem and they replaced this 2wire modem with another I decided to buy a "wireless printer" now I am in the same shape as before. Anyone else have this much trouble with 2Wire?

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Ignore the instructions that come with the printer, choose Open System, then choose WEP, enter, and it hooks up. Thanks to the above posters for this solution.

Posted on Oct 18, 2009

  • Libby Roberts
    Libby Roberts Dec 26, 2014

    Thank you. This was very helpful. I normally use the OK button as "Enter". But, receive the message, "hit Enter, then OK". Does anyone know where the enter button is on a Brother MFC9480CDW? Thank you.

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One could connect the MFC with modem-router using the key pad on the MFC. Press the menu button and scroll down to LAN, press OK and scroll down to WLAN, OK and scroll down to Setup Wizard. MFC would detect and display wireless router. Choose Open System and put in the WEP key if needed. MFC would be CONNECTED. For most modem-router, it is critical to scroll down to WLAN --> TCP/IP and change the BOOT METHOD to DHCP. One would think that the default AUTO setting would work but it would not connect the laptop with the MFC. Next step is to install the MFL-Pro software in the laptop. One must turn off all the firewall before installation. The installation should detect the MFC and there would not be any problem afterward.

Posted on Sep 01, 2009

  • 2 more comments 
  • creativeambe Jun 14, 2011

    Yay! I am so excited! I have been trying to re-connect my printer here and there for a few months. This worked for me!!!

  • jcollison19 Aug 11, 2011

    This worked. THANKS!

  • karenkool
    karenkool Feb 08, 2013

    The part that I can't get passed is the WEP key. I enter the key (that is the password, correct?) and press ok and it asks to enter & press OK, so I try it again and the same thing. Any ideas?

  • Steve Frye
    Steve Frye May 08, 2014

    No ideas here. I'm in the same spot. I'm going shopping tomorrow for another brand. Had it after spending 3 hours on this POS tonight.

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For me, the quick solution was to use the 'Open System' instead of 'Shared Key', 'WPA/WPA2-PSK' or 'LEAP' authentication options on your printer.

However, after that, I decided to change the security settings on my router a bit. Log into your router, click the 'Home Network' icon at the top, and then check out 'Wireless Settings.'

The 'Wireless Security' section should tell you how your 2Wire is configured (which I eventually changed to WPA2-PSK.)

-DJ

Posted on Nov 15, 2008

  • paack Apr 03, 2011

    Does " open system " allow my near neighbors to use my printer?

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I had the same problems with a 2Wire router from AT&T.

I simply found the router and selected "open system" and then chose the WEP encryption and entered the key. The printer immediately connected to the router. I haven't completed setup yet so I don't know if it prints over the network but it displayed "connected" rather than "connection ng."

Posted on Mar 26, 2009

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I just switched to AT&T Uverse too. I connected the printer to the network fine (it said "connected"), but it shows as offline in my task tray and will not accept any jobs wirelessly. I can print through USB. Any ideas?

Posted on Aug 17, 2010

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The solution above from DJOrtley just did it for me.  I have Verizon FIOS and the Actiontec router MI424-WR Rev. D .  I wasn't selecting Open System, I was selecting Shared and would put in my WEP key and it wouldn't work.  I didn't know to use Open System.  

Posted on Jan 13, 2009

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Your problem is the security settings in your wireless router.

As smart as the MFC-7840 is, it can only negotiate the security cypher AES. Your router may have settings for TKIP, AES, or both. Change it to WPA2 AES and you should be on the network quickly.

Posted on Aug 13, 2011

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I spent some time to install this printer on a WAP/WAP2 network. Here is was I did to make it work. Since my Cisco E2000 Router was set to the 5GHz band I downgraded this to 2.4 Ghz and the connection was working.

Posted on Jan 21, 2011

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DocSavageGood nailed it. The router is not Shared with WEP, it is Open with WEP.

Mike

Posted on Aug 03, 2010

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  • sroberts88 Mar 30, 2011

    Hi I have a different printer and a different provider but the same problem. My router settings don't give me and 'open' option, only 'shared', does anyone know why this might be and what I can do about it?

    Susan

  • myprime9 Mar 31, 2011

    try doing a simple reset or restore factory settings. sometimes this helps to clear out any of the clutter of passwords/keys that you have input over and over while frustrated. i just did that and voila, the darn thing worked right away

  • AndreiK Sep 22, 2011

    THIS WORKS!!!!! Thank you

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DJOrtley's solution is the key, but make sure NO Laptop is near the printer at that time since it can interrupt the wireless signal to the printer!

Posted on Dec 14, 2009

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I had to change my router setting to WPA-Personal only.

Posted on Jul 11, 2012

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Ive Tried all of the above and none of is is working.
I am using a Linksys router, With teh Wifi protect. that doesnt work at all. then I do manualy it finds network. i select open system, then go to wep. I add wep keep, now ive doen it both 128 bit and 64. Still get that stupid Connection NG. the Router is practly on top of the printer. Ive even tured off all electronics in teh who area to make sure its not interferring. but no avail. yet all my other Wireless deiveces, PSP,DSI, P3 and some Ipods connect with out problems
What gives

Posted on Jun 30, 2010

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Look under the WLAN submenu on your printer and scroll to item #7...enable WLAN yes/no. You want 'yes' of course. Problem solved. I had no problem with the initial set up of the device when I bought it about a year ago. Then my network and the printer stopped talking. I tried all the advice on these sites like everyone else, and nothing worked. Then I happened to scroll around, and sure enough, item #7 appeared. Printing wirelessly like a charm now.

Posted on Sep 14, 2010

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On my router, the issue was that I had the Wireless Mode set to "N only." Changed to B/G/N and it connected on the first try.

Posted on Nov 13, 2014

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I followed the menu instructions above and then W7 saw the printer, went and got the driver, loaded it and then I printed. THis absolutely works. Just like MS said it would under w98 LOL!

Posted on Jan 20, 2013

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I've tried just about everything in this thread and am totally frustrated. My Brother wireless worked great for a couple of years, and just decided to stop talking to my home network. It won't let me reconnect. I'm heading out tomorrow to find an HP or some other brand. I've wasted more time trying to get this POS to talk to my network than the stupid printer was worth in the first place. Big thumbs down on this product tonight.

Posted on May 08, 2014

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SOURCE: I have a Brother MFC-7840w wireless printer. I'm

I have a Brother HL-5370DW. I changed the encryption to AES and that allowed it to connect with WPA2-PSK

Posted on Apr 22, 2013

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Hi,

Improve the Fixya.com experience for everyone by voting!

The solution I'm suggesting works in my business (LAN installations) about 95% of the time. I trust that it will work for you.

Let's see if I can help you.

Begin by turning on your computer and your router

Make certain that you have the latest drivers from Brother by clicking on the following link: Brother Driver Downloads

Open Control Panel and click on 'Diagnose Connection Problems' and follow the instructions.

The last choice is to use the Setup Wizard. It seldom works for me but you might more luck than poor me. Here are the instructions:

The Connect to the Internet wizard will guide you through the steps of setting up an Internet connection.

Open the Connect to the Internet wizard by:

• Clicking the Start button Picture of the Start button
• Click on Control Panel.
• In the search box, type network,
• Click "Network and Sharing Center"
• Click Set up a new connection or network
• Then double-click "Connect to the Internet".

This should have you up and running.

All the best

Ben

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To setup your Brother MFC-7840W on a wireless network do the following:

Press Menu.

Scroll down to #5 LAN and hit OK

In the LAN submenu, scroll down to 2. WLAN and hit OK.

In the WLAN submenu select 2. Setup Wizard.
(The printer will search for the SSID of your network. If you are presented with multiple networks, select yours and hit OK.)

Depending whether you have setup a network key on your wireless network, you will have to choose the type of connection. Your options will be Open System, Shared key, and WPA/WPA2-PSK.

If you have a Shared Key or WPA/WPA2-PSK network, then you willhave to enter the key to connect. Open Key does not use a key to connect.

So for instance, if you selected WPA2-PSK you will then be asked to enter your passphrase key to connect to your wireless network.

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