Question about Brother MFC 7420 All-In-One Laser Printer

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MFC 7420 fail to warm up message

I have a fail to warm up message on my MFC 7420. I have tried turning it off and then restarting it. Any suggestions?

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  • wewerg Dec 23, 2008

    i have got one and same symptom. please help me

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You need to replace the fuser section. in the fuser section u have a heater lamp and a thermister, either of thease could be bad. i would generaly go for the lamp. how ever the lamp can only be purchased through a authorized service center

Posted on Jan 13, 2009

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Fax automaticaly daling #365 etc like tha number how can reset my MFC 7450 printer


Found this here...

(For MFC-7420)
When you turn off the MFC's power switch its memory will be cleared. To check
whether the MFC has faxes in its memory see Checking if the MFC has faxes in
its memory on page 11-5. If there are faxes you need to save them before following
the suggestions below (See Transferring faxes to your PC on page 11-5 or
Forwarding faxes to another fax machine on page 11-5).
Turn off the MFC's power switch and then turn it on again. If the error message
continues, leave the MFC for several minutes and try it again.
Check the settings in your application software to make sure it is set up to work
with your MFC.

(For MFC-7820N)
Turn off the MFC's power switch and then turn it on again. If the error message
continues leave the MFC for several minutes and then try it again. (The MFC can
be turned off for up to 4 days without losing faxes stored in the memory.)

Looking through this manual, this is the only solution that I could find. There are options on the 7820N model in the menus that will allow you to reset the printer itself, and i quick search through the above link for "printer reset" should bring you to the menu selections for that.

Jun 29, 2011 | Brother MFC 7420 All-In-One Laser Printer

2 Answers

Brother mfc-7340 tooner life end


1) Pull out the cartridge and look on the right side of the it. You will see a small hole that has a glass like window in side (round window).

2) Turn off MFC-7420

3) Cover the hole on cartridge with a duct or a piece of paper. Basically block.

4) Replace the cartride back in the printer and turn on the printer.

5) The message should be gone and you should be able to use the copier functionality.

It worked perfectly.

May 30, 2011 | Printers & Copiers

1 Answer

"fail to warm up" see troubleshooting


Try this remove the cartridge and return it back. Turn it off for 1 minute and turn it on. If still problem, Remove the power cord to 30 second and return it back with power supply turn off. and restart the printer

Jan 05, 2011 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Model - MFC-7420 - FUSER ERROR


Is the paper that comes out of the paper warm or cool?
If "cool", then the fuser is not operating.

The job of the "fuser" is to generate heat to melt the powdered-ink into the paper, to make a permanent bond.

So, take the printer to a qualified technician, for trouble-shooting.

Nov 18, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Errors when scanning via all methods


You just didn't set up the scanner function, please reinstall the software and restart before you use the scanner.

May 15, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Errror message clean corona wire


Try this link http://www.brother-usa.com/ check out the FAQ and Troubleshooting

If you found any of this information helpful, please rate my solution. Thanks D. Lange

Apr 21, 2009 | Brother MFC 7420 All-In-One Laser Printer

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