Question about HP Officejet Pro K850 InkJet Printer

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HP Officejet Pro - Printer Door Open Light Stuck On

Have a 1 year old HP Officejet Pro K850 with a "door open" light that seems to be stuck on. Have checked and rechecked all doors and access panels, even uninstalled and reinstalled the duplex unit. Have no idea why the door light is still on.

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  • Anonymous Mar 06, 2009

    I have same problem also.

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There is a problem with the proximity sensor for the top door. I have took mine off and soldered the connections over to trick it into thinking the door is closed all the time. I am trying to source a new part

Posted on Jan 11, 2010

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Power light is on & resume light is blinking, in hp officejet K850. Could anyone suggest me a solution for?


The Power light is on and the Resume light blinks. The printer is out of paper. &#... the printer, and press (Resume button). The Power light and the Resume light are on. A cover is not closed completely. ?... completely. ?

Jun 29, 2011 | HP Officejet Pro K850 InkJet Printer

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Rear panel is closed scanner says i'ts open and will not print


Remove all the paper out of the machine
At the back of the printer there is an access door.
Open up the door.
Look for any paper that may be stuck inside.
If there is paper, slowly pull it out of the machine.
Close the access door

Feb 14, 2011 | HP OfficeJet Pro L7580 InkJet Printer

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My brand new hp 8500 wireless office ink jet printer say open the carriage access door clear the jam. We took the small 2 ink cartiages out and put them in again and this keeps come up.What do we do now?...


Why are you taking out the ink cartridges??
The message says to open the carriage access door and clear the jam. The printer thinks that paper is stuck in the paper path, see if you can find it. I believe that there is also a rear door on that printer, remove it and look inside.

Sep 10, 2010 | HP Officejet Pro 8500 Wireless All-In-One...

1 Answer

How to disassemble hp k850


I had the same problem. Chatted with HP technician who indicated the repair would cost more than a new printer. I asked for access to service manual but was told there is none. I was able to fix it myself by using a hacksaw blade to cut across the dark plastic bridge area that hides the open cover sensor. After removing this section of plastic I was able to see the wiring plug attached to the faulty sensor. All you have to do is jumper the two colored wires together (ignore the black wire) and the cover open error will go away. Make sure you clean out all the debris you created from cutting out the plastic section before powering it up. I placed a clean rag inside the printer under this area before cutting to catch most of the plastic "sawdust." It wasn't pretty, but it was better than throwing the printer away and buying a new one. It didn't take more than a few minutes to fix, and with the cover down, you don't even know it's been "hacked."

Feb 05, 2010 | HP Officejet Pro K850 InkJet Printer

1 Answer

Error message= open door clear carriage jam and


I think the message is instructions, as in
(1) open door (2) clear carriage jam (3) press enter
So there is something internal to the printer that makes it think it has a carriage jam, piece of paper under a sensor, dirty or stuck sensor.
If you can't find it using a bright light, try canned air.

Feb 01, 2010 | HP OfficeJet 6110 All-In-One InkJet...

2 Answers

HP Officejet Pro L7800. Had paper jam, but opened


mine was 2 there was paper stuck in the little white gears

Nov 02, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

My Officejet pro has a paper jam and I can't release it. Thanks


  1. Turn off the printer.
  2. Inspect the location or tray the printed paper ejects to. If the stuck paper is visible manually remove it.*
  3. Remove all paper trays and any paper that may be stuck between the tray and the printer. If the stuck paper is visible manually remove it.*
  4. Open the printer door that allows you access to the printer ink cartridges or toner and look for any stuck paper. If the stuck paper is visible manually remove it.*
  5. Turn the printer back on. If you continue to receive a printer jam error try repeating the above steps again. If issue still persist and you see no paper that is stuck in the printer it's likely your printer is experiencing another hardware issue and i suggest contacting the printer manufacturer for additional assistance and/or repair.

Jul 13, 2009 | HP Officejet Pro K5400 All-In-One InkJet...

1 Answer

One page printing than 3 head light blinking c/m/y


pls clean and oiling the catridge rod of your printer.

Jun 25, 2009 | HP Officejet Pro K850 InkJet Printer

1 Answer

The paper is stuck in my printer


There should be a little door on the back side of the printer at the bottom. On the left or right side there should be a tab that will allow you to unlock the door and open it. There you can slowly pull out the paper.

Jun 18, 2009 | HP Officejet Pro L7680 All-In-One Printer

1 Answer

Printer lid open light is coming on when printer lid is closed


The printer lid error can appear if any of the following are true:
- top lid is open
- rear duplexer or flat panel is not installed correctly
- cartridge bay area door is open

All of these conditions are detected by a series of sensors or circuits in the printer design so with regard to the lid and cartridge bad door you need to make sure that nothing has broken off that closes the switch.

I'd lay odds that it's most likey the rear panel/duplex unit. I'd recommend taking this out as per the manuals instructions and then reinserting it, carefully so that it fits in place properly.

Hope that solves your problem.

Martin

May 19, 2009 | HP Officejet Pro K850 InkJet Printer

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