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HP3940 Deskjet shows door open message when doo is closed and power light is blikning. Heads parked in ready to print position (left side). Tried power reset as recommended by HP trouble shooting? Need help!

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  • David Williams Sep 11, 2010

    The switch is active as the carriage moves to the center with the door open and then back to the raeady to print position (left) when door is closed. The power light blinks all the time and the message "door open" appears at the top of the print que box. The request to print a test page registers in the print que but does not execute.

  • David Williams Sep 11, 2010

    IT IS OBVIOUS THAT THE DOOR SWITCH IS ACTIVE AND COMMUNICATING ITS CONDITION TO THE CONTROL CARD BUT THE CONTROL CARD IS NOT SENDING THE CORRECT INFORMATION TO THE REST OF THE SYSTEM. IF THE SWITCH OR ITS CONNECTION TO THE CARD WERE AT FAULT THE CARTRIGE CARRIAGE WOULD STAY IN THE LOAD/UNLOD CARTRIGE POSITION(CENTER).THIS IS NOT THE CASE THEREFORE I SUSPECT THAT THE PORBLEM IS A MALFUNCTION OF THE CIRCUIT ON THE CONTROL CARD.

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Your device is quite an interesting one to use as it is a very effecient machine.
When the door open message displays it is usually as a result of the sensor in the unit which is responsible for detecting the door malfunctioning. Get an expert to service the unit and check for any breakages in the door as this could also make the sensor to malfunction.
Get the unit serviced and leave idle for some days to enable the unit reset itself.
Hope this solution has been helpful?

Posted on Sep 11, 2010

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The door switch is still engaged. Open the door and look inside, make sure that nothing is in the way or out from where it's supposed to be, then make sure the door is moving freely and it's well seated (warp it from side to side to be sure) then close it. If the message is still there then the door sensor (a small black switch) is stuck and to fix it you must open the printer and manually reset it.

Posted on Sep 11, 2010

  • Azrael SRL Sep 11, 2010

    As i said all this is caused by a faulty door switch - it's locked in the open door position and you need to release it somehow. Move the door in all positions and make sure its hinges are free then check the lever for the switch - make sure it's touching the sensor.

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Hi

Please try this solution

Remove the USB cable into the printer and leave the printer on.
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Disconnect the power cable and from the power source supply.
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Here is my solution, hope it will solve your problem.

From your post, I believe your CLP-350N printer has enough black toner. The black cartridge is on the far right side of the printer, so the black toner is harder to go to left side of the roller than right side. Everytime we start the printer, it will move some toner of each color to the roller before it shows ready to print.

Because we always use B&W printing when we start the printer, but less Color printing. The result is there are always enough toner on the 3 color rollers, but the black toner is lean on the black roller. When this gets worse, the left side of the black roller may hardly get any toner at all -- so it only print black on the right side fo paper.

Step by step solution
(CAUTION: Never loss balance while tilting printer! You may drop and damage your printer! Hold the printer firmly all the time! Ask someone to help you if needed!)

Here, front of the printer is where you can access the cartridge, back of the printer is where you connect the power cord and USB cable, left is your left, right is your right.

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Hello,

Try this procedure:
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I hope this helps, if so please rate our solution.

Buddy
Corporate Computer
www.ccl-la.com

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