Message change catridge in the display

Hi there!
The error message that you are getting means there's a jammed paper inside the machine particularly in the feeder. This may also appear if the panel is not closed securely. Try to open the control panel and look for any pieces of jammed paper or debris. Closed the front cover or the control panel, it should display the regular screen date/time. Once you have the regular screen load the document on the feeder, the display should change and should ask you to enter the fax number.
Hope this helps!
Please rate if it worked, Thanks

Open the top and back covers. If you see any jammed paper or
other item, gently pull it out, then close the covers. If the error message
remains, open and close the covers again. If the FAX/MFC cannot reset
itself and return to the date and time prompt, it will display MACHINE
ERROR XX. Please call Brother Customer Service
and tell them the Machine Error number at:
In USA:
1-800-284-4329
In Canada:
1-800-853-6660
In Montreal:
1-514-685-6464

1. With unit powered On, open the front cover.

2. Press the "Options" key. Display will show "Replace Drum?"

3. Press "Start" key.

4. Press 1,0 .

5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".

6. Close cover and see if Toner Life End error message has gone.

Good Luck and Thank You for using Fixya.

fax toner catridge door is not properly closed. when you close that there is a micro switch that is not going to activate. Please be sure it is closed properly

Try this Issue When trying to copy, print, or receive a fax, the following error message appears on the product control panel display. Ink System Failure. Ink system has failed. Unable to copy, receive faxes, or print. Refer to printer documentation. Error: 0xc19aYYYY NOTE: The Y in the error message represents any digit, 0 - 9, or any character, A - F. Solution To resolve the issue, use the following steps. Step one: Remove the cartridges Make sure that the product is turned on and then disconnect the USB cable from the back of the product. Open the product cover and remove the cartridges. Close the cover and wait for a message to insert the cartridges to appear on the control panel display. Disconnect the power cord from the back of the product. Disconnect the power cord from the wall outlet and wait for one minute. Step two: Reinstall the cartridges Reconnect the power cord to the wall, reconnect the other end of the power cord to the product, and then turn on the product if it is not already on. Open the product cover and reinstall the cartridges. Close the cover and print a calibration page, if prompted. Print a self test report to make sure that the product can print. Reconnect the USB cable between the product and the computer. Try to print a document from an application on the computer.

with machine on, open front cover, press the "options" button, you should see "replace drum?" press the "start" key then 1 then 0. display should show accepted for a couple of secs. then show cover open. close front cover and message should be gone. if not, you will have to contact Brother.

hth,
razors

did you fixed your problem with the folding machine??

5750e fax machine: To reset the drum counter follow the instructions listed below :
Get the message to appear in the LED
1. Open the front cover.
2. Remove and Re-insert Drum/Toner unit
3. Press the CLEAR key.
4. Press 1 to reset.
5. Close the front cover, pressing firmly on each side until they click
into place.

http://www.brother-usa.com/FAQs/Solution.aspx?FAQID=100000007572&Sympt=Why+does+the+message+CHANGE+DRUM+SOON+continue+to+appear+on+the+LCD+display+after+I+replaced+the+drum%3f&Model=58&ProductGroup=2&Keyword=Change%20drum%20soon%20message&ProductID=PPF5750e

This message would continue to appear if the drum counter was not reset when you replaced the drum. To reset the drum counter, follow the instructions listed below.

1. Open the front cover.
2. Press the Options key on the control panel.
   The display will show "REPLACE DRUM - 1.YES 2.NO".
3. Press 1 to reset the drum count.
4. Close the front cover.

It appears that you have a broken back door have a look on the door to see if there is a broken piece of plastic as when you shut the rear door a tab pushes against a push switch letting the machine know that the door is closed. if you cannot see a broken piece then the switch it faulty try this by push a flat screw driver on the switch and check if the message disappears.

Thanks J