Question about HP DeskJet 3940 InkJet Photo Printer

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Keep geting the door open error message for HP Deskjet 3920/3940. What door and how do I close it?

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The front cover is the door. Make sure no obstacle resides between cover and chasis.

There is a small switch (under cover) on the left side of the printer.

If for any reason you get same error then insert a small paper between the switch and chasis.

good luck

pls. vote for better service

Posted on Nov 11, 2010

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Compare una scritta: la stampante non è in linea. perchè? sembra tutto normale!

Posted on May 24, 2011

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Posted on Jan 02, 2017

doniteloon
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SOURCE: I keep geting the door

hi there!

make sure that the top cover of your hp deskjet is fully closed, open it up again, check for any obstruction then make sure you hear the snap sound when you close it back. if you're in the usa, you can contact 800-hp invent for technical support especially if the printer is still in warranty!

Posted on Apr 06, 2011

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1 Answer

I keep geting the door open error message for HP Deskjet 3940. How can i fix this problem?


hi there!

make sure that the top cover of your hp deskjet is fully closed, open it up again, check for any obstruction then make sure you hear the snap sound when you close it back. if you're in the usa, you can contact 800-hp invent for technical support especially if the printer is still in warranty!

Apr 06, 2011 | HP DeskJet 3940 InkJet Photo Printer

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Please restart your printer and then check if you get the same error.

Mar 23, 2009 | HP Deskjet 6940 InkJet Printer

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Turn the printer off
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Aug 08, 2008 | HP Deskjet 6940 InkJet Printer

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HP Deskjet 5150 - top cover open


I had the same problem, and the cause turned out to be the cover switch not being fully pushed in. On the underside right edge of the top cover, there's a little triangular protrusion that pushes down a black rectangular button (the cover switch) when the cover is closed. The problem occurs because the flimsy top cover is made of plastic and flexes slightly when you close it. This means that sometimes, the right edge of the cover won't seat properly even though it appears as if the cover is closed all the way. When this happens, the triangular protrusion isn't fully pressing the switch down.

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.

In my case, all I had to do the fix the problem was close the cover and make sure it was fully seated by firmly pressing down the right edge of the cover until I heard a plasticky "click" noise. After that, the problem went away.

Hope this helps.

Jul 23, 2008 | HP DeskJet 5150 InkJet Printer

1 Answer

Back door closed


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.

Dec 22, 2007 | HP Deskjet 6940 InkJet Printer

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