Question about Brother MFC 8440 All-In-One Laser Printer

2 Answers

'Doc Cover open' error message

I cannot get rid of this message even though the cover is closed. Is there a sensor switch I can disable? My email address is alfred@sfsgo.com
Regards
Fred Pettit

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2 Answers

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  • Expert
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NO no Sensor to disable
Check the Tab on the top of the Document Door
there is a table on it. Make sure the Senor Tab is NOT broken.
if it is you will have to have someone replace the Cover. their's a sensor on the document door make sure that not offset if it missing the tab it will ask you to close the door.
Check those two things first.
Worst Case you have a Bad Sensor and will need replacement.

Posted on Sep 13, 2009

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  • 1,362 Answers

Look for switch where the doc door closes and insert a piece of paper to trigger it, message should clear, adjust switch.

Posted on Aug 21, 2008

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1 Answer

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Tip

Main Error MINOLTA DI 1611, DI 2011 Messages and Their Remedies


PAPER JAM A paper misfeed occurred in the
main unit.
Open the cover at the indicated
location, and then remove the
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(Flashing alternately)
OPEN XXX SIDE COVER
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ORIGINAL DOC.JAM A paper misfeed occurred in the
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All misfed paper was not removed
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(Flashing alternately)
OPEN DOC.FEED COVER
∗REMOVE PAPER IN
BYPASS TRAY∗
Paper is loaded in the Manual
Bypass.
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Bypass.
FRONT COVER OPEN The Front Cover of the main unit is
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(Flashing alternately)
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DUPLEX COVER OPEN The Duplex Unit Cover is open or
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(Flashing alternately)
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(Flashing alternately)
CLOSE DOCUMENT
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DOC.FEED COVER OPEN The Document Feeder Cover is
open.
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Feeder Cover.
(Flashing alternately)
CLOSE DOC.FEED
COVER
TONER EMPTY The toner is empty. Copying and
printing cannot be performed.
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SUPPLY TONER
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indicates the paper tray, and
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on Dec 18, 2009 | Office Equipment & Supplies

1 Answer

The error message says Doc. Cover open but the cover is closed


You will probably have a broken hinge at the back left hand side of the Doc. cover.
This means that the cover won't close properly at the back corner, and the cover sensing switch won't actuate.

Dec 08, 2009 | Brother MFC-8840D All-In-One Laser Printer

1 Answer

I changed the ink in my Lexmark 3400 printer and I keep getting an error message "cover open" and it's not open. I tried everything....unloading the software then reloading the software, shutting it off...


The printer displays a 'Cover open, please close cover' error message, even though the cover is closed.

This can happen if the lever on the cover open sensor is knocked off the switch assembly.

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1 Answer

Lexmark x3470 printer says "cover open" and it will not do anything. Curtis


Try these as I found them from Lexmark's website

Solution What you will see
The printer displays a 'Cover open, please close cover' error message, even though the cover is closed.
Possible cause of the error
This can happen if the lever on the cover open sensor is knocked off the switch assembly.
What to do
Take the following steps to try to determine if there is a hardware fault:
Steps Actions 1 Remove and replace the cartridges from the printer. 2 Disconnect the power cable and the USB cable. 3 Check that the power cable is plugged directly into a wall socket. 4 Reconnect the power cable. 5 Close the printer cover. 6 If the error persists, please contact Lexmark Technical Support for further instructions.

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2 Answers

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To test if this is this is happening, send a print job to the printer and wait for the "top cover is open" error message to appear. Next, open the top cover door and locate the cover switch. It's a little black button in a rectangular hole at the right edge of the doorway near the ink cartridges. Take a pen or a car key and use it to push the cover switch down. You can also use your fingertip to do this if it's skinny enough. If you keep the cover switch pressed down, the power button should start blinking to indicate a print job is coming through. If the print job actually starts printing, then you know the problem was the cover switch.

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Hope this helps.

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1 Answer

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1 Answer

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5 Answers

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