Question about HP Deskjet 6940 InkJet Printer

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Back door closed

In printer one message is coming back door open cover open message; all the doors are closed; turned it off and on; I wonder if there is a 'reset' button, or if it might be worth it to get canned air... Also is there a schematic drawing of these printers? I'd be happy to take it apart. thanks in advance Sheila

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I did not get any error message but the 6940 printer would not print. Instead "Ready" the printer said "door open". When I deleted printer and plugged the usb cable back in the XP machine found the new hardware, said "Ready" and could print.

Posted on Jan 16, 2008

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Posted on Jan 02, 2017

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The message indicates that the printer door or the cover located on the top is not closed properly, so you need to re-open the door or the printer cover and close it accurately.

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Keeps saying cover is open/ please close the ADF cover


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Front or vrear cover open


there are 2 switches regarding this error message " front and rear cover open." so pls. check with the front door right side portion. you can see a small leaver there, pls. check that liver correctly go inside the cover after we close the front door.
other switch at the back door paper exit area. pls. check the door closed properly nor not ? that door control a switch liver attached with the fuser unit.
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kindly check it and revert back.

May 05, 2014 | Samsung SCX 4521F All-In-One Laser Printer

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Hp cp2025 error reads "front door open" when front door is closed


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Sep 12, 2012 | HP Laserjet Cp2025n Printer

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BACK COVER OPEN


The back cover sensor is detecting the back door is opened. Open and close the back door firmly to fix this message.

Aug 22, 2012 | Brother DCP-7020 All-In-One Laser Printer

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My p0rinter is not printing with good color quality. Blue doesn't pick up. I ran the troubleshooting and the error code 3502,3501,,3830, comes up. How may I fix this? I have new cartridges. thank you....


This is from the Kodak website.

How do I resolve the error message "Printer Access Door Open" (error code 3501 or 3609)? Published 08/25/2010 11:38 AM ' Updated 01/07/2011 08:40 AM ' Answer ID 1467 How do I resolve the error message "Printer Access Door Open" (error code 3501 or 3609)? To resolve this error, close the printer access door. The printer will not operate while the door/cover is open.

If the error continues even after you close the printer access door, power cycle the printer:
  1. Turn off the power (press the On/Off button on the printer).
  2. Unplug the printer power cord from the back of the printer.
  3. Wait approximately 30 seconds.
  4. Plug the printer power cord into the back of the printer.
  5. Turn on the power to the printer.

Feb 07, 2011 | Kodak ESP 5 Printer

1 Answer

Brother (photocopier, fax and scanner machine) says << back cover open. close back cover>> but the back cover (or at least what i think is the back cover) is closed. I even opened and closed it...


I have fixed this problem on my 7820n printer by brother.

open the back door, then inside there will be a black colored other kind of like door that pulls back away from the roller. on this inner door is a black long thin plastic lever that runs from about the center of the inner door to the right. on the right end of it is a lever that slides along a curved increase on the right side wall. when both doors are closed this right end of the rod or lever moves up to close the gap between what is the sensor. this long thin plastic rod had snapped out of place and when i snapped it back in making sure the spring was correctly installed on the left end of it and the middle part of the rod slid correctly in its groove...the right end of the lever correctly closed the gap on the sensor (when both doors are closed) and the back door open error went away.

So that's how you really fix it!!!!

James Hilliard - Totally super awesome guy! hee hee

Oct 27, 2009 | Brother MFC-7820N Printer

1 Answer

Make sure that all the covers are closed...


Hello sir; Does screen display which door open? if not, you can try to open each door, use screw driver to actuact door switch, to find out which door switch defective.

Feb 03, 2009 | Canon imageRUNNER 5570 Copier

3 Answers

Back cover open message


I had the same error message. I also tried every compartment... Here's ultimately what my problem/solution was...

I turned the printer around and fully opened the back cover. I found that one of my kids had somehow fed a small piece of paper/cardboard into the printer. When I opened the back cover all the way I could see that obstruction (which I hadn't seen before). Pulled it out, and the error message went away. Works fine now.

Sep 02, 2008 | Brother MFC-7820N Printer

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HP6310


Something is holding the top cover on the printer open enough so it is not pressing the switch to tell it it is closed, OR there may be a back door on the printer that is not fully closed. Many printers have an access door in the back for clearing paper jams. If the back door is not fully seated and latched it will cause an error.

Mar 18, 2008 | HP Officejet 6310 All-In-One InkJet...

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