Question about Brother MFC-5840CN All-In-One InkJet Printer

1 Answer

Startup problems with the MFC-5840CN All-in-one

When the MFC is plugged in and turned on, there is a grinding sound that comes from the area of the scanner bar. The led readout is" Please Wait..Res: Standard". The machine will cycle through this same process again and again, and never comes on for proper operation. The scanner bar, which usually aligns itself while the scanner is warming up, does not move and the rubber drive belt seems to be trying to drive the scanner bar forward, to no avail. The machine then turns itself off and tries the startup process again. An interesting observation - When the scanner bed and the printer cover is open to be able to look inside, the scanner bar aligns itself as normally the case, but the machine turns off immediately when the cover is placed in the down (normal - closed) position. I spoke with techs at the brother help site, but they were at a loss as to what is happening. Can anyone help?

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 18 Answers

Well thisone most techs have to see first. the simple solution is that the cover is binding some where and putting pressure on the scanner bar or its slide rail. my best sugestion is to take it to a printer tech and have them look at it

Posted on Sep 06, 2007


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Brother MFC scanner bar is stuck

check the continuty in scanner cable to cis unit and check the continuity 2ends off scanner cable.
1.cable problem
2cis problem

Mar 31, 2014 | Brother MFC Office Equipment & Supplies

1 Answer

Readout -

Error "unable to clean" on Brother MFC Hi there

· Machine off
· Switch on the machine while holding down the “menu”button until all the leds are flashing on/off. Now you are in “maintenance” mode.
· Press 80
· Press the “mono start” button several times until you see “purge: xxxx”
· Press “2783” in order to reset the purge counter. You will see: “purge:0000”
· Press the "stop" button.
· Press “99” to exit the maintenance mode.

Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.

All The Best: Pineworks

Mar 22, 2010 | Brother MFC-5840CN All-In-One InkJet...

1 Answer

Scanner bar will not reset, error "unable to Init. AF"

the problem might be the connection from the mother board of the printer to the scanner maybe due to lost contact and the ribbon was broken you might just have to reconnect it or it might be broken and need replacement

May 10, 2009 | Office Equipment & Supplies

1 Answer

Squeaking and grinding upon printing.

MFC 240C turned on, and the LED indicates a print jam and a scraping sound, when there is no printer jam.

May 05, 2009 | Brother Multi-Function Center MFC-240C...

2 Answers


The problem is your need to change the Main board or scanner...cant be fix it need be replace either main board or scanner sometime worse senario it need both.....The cos of teh scanner and board kinda expensive....

Dec 15, 2007 | Brother MFC 210C All-In-One InkJet Printer

1 Answer

Mfc210c says no device

This could be for two reasons:
1. Lightning strike the days before has seriously damaged the circuit board.
2. (nearly the same) some part within the circuit board is damaged.

In both ways the circuit baord needs replacement. Unfurtunately the costs for this spare part is twice as high as a new mfc 240c...

You can try to buy another defectiv one (scanner broken or clogged print head) from eBay and simply change the circuit board, to keep your machine alive (This is what brother themself do: collecting faulty machines, separate parts and refurbish them for swapping ;-))

Dec 07, 2007 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Brother MFC-425CN

AF after cleaning cycles??????????????????????????

AF means that the scanner flatcable is not connected to the main pcb (When powering up you should hear a grinding sound from the scanner area). Open the scanner cover as for changing the ink carts. Open the small cover (looks like a " L ") and connect the white flat cable simply by pushing it into the main pcb.

Oct 25, 2007 | Brother MFC-425CN Multi-Function Center...

2 Answers

Error change unable 51

Unload the software. Restart the computer come off line. disable the anti virus Re install follow the prompts exactly. If still introuble take a look at

Aug 31, 2007 | Brother Multi-Function Center MFC-240C...

2 Answers

Startup problems with the Brother MFC-5840CD All-in-one

You have to open the scannerbox very carefully. There is a contact on the lefthandside placed where the motor and belt is located. Check the position of the motor an ohter parts, by carefully sliding the scanner bar by hand. You may need to click in some parts because they have got loosen. Reassemble scannerbox.

Aug 16, 2007 | Brother MFC-5840CN All-In-One InkJet...

Not finding what you are looking for?
Brother MFC-5840CN All-In-One InkJet Printer Logo

195 people viewed this question

Ask a Question

Usually answered in minutes!

Top Brother Office Equipment & Supplies Experts


Level 3 Expert

1363 Answers

James Cagle
James Cagle

Level 2 Expert

482 Answers

Jim Keysor

Level 2 Expert

331 Answers

Are you a Brother Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides