Question about HP Deskjet 840 InkJet Printer

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Re-setting the printer after a problem

When i have sorted out a print problem such as a paper jam the hp840c will only print single lines of symbols on consecutive sheets of paper instead of the document waiting. is there any way to re-set it quickly rather than turning it off and then on again 15 mins later?

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Go to start settings - printers and faxes and delete any printing jobs in printer panel
turn off the printer, and when all jobs are gone turn it on

That's it

Posted on Jul 24, 2009

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Posted on Jan 02, 2017

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1 Answer

What does the "heart beat" symbol/light mean?


I assume you mean the symbol that has a pair blackened circles and then a pulse up and then down below the starting line before returning to the starting line.

That is the paper jam symbol. If the continue light is on (steady) and the paper jam light is on, then you have a paper jam. Press Continue twice to see any secondary error message (this will show where the problem is).

See the manual for the list of the lights that show where the jam is occurring. Different groups of lights will be lit. The manual is available as a PDF at the bottom of this page: http://support.lexmark.com/index?locale=EN&page=product&userlocale=EN . An example: if the Continue, Toner Low and Paper Jam are all on, then the jam is in the fuser area under the print cartridge assembly. For a paper jam, even a small corner of torn paper could be in the mechanism.

In all cases, you should check the entire paper path. When you pull out any paper, grip it so that you can gently pull the sheet straight out. Remove all paper from the output tray. Then remove the paper tray if you are using it. Pull any paper from this area. Press down on the green duplex flap and remove any paper from there Reinsert the paper tray. Open the front door of the printer and remove the print cartridge assembly. Lift the green flap and remove any paper from the area. NOTE: the fuser and the fuser area may be hot. Open the rear exit door and remove any paper from that area. Use a flashlight to check for small pieces of paper that may be stuck. Once all the paper is removed, reinstall the print cartridge assembly and close all the doors. Press Continue to reset the printer.

The page that jammed may be reprinted.

I hope this helps.

Cindy Wells
(please note that frequent paper jams may be a sign of excess humidity in the paper. Put less paper in the tray at each refill and keep the remaining paper in a dry location. If the paper jam light is coming on when no paper jam is present, one or more of the paper jam sensors may be bad. Contact Lexmark for more information.)

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check between the rollers there will be small bits of paper jammed in that is the reason.

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The symbol with the 2 dots and what looks like a jagged line is the paper jam indicator. Open the paper tray and or front and back access doors to find and remove the paper jam. I the light still does not clear try turning the printer off then on to reset the jam indication.

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With my Brother 8840D I have had paper jams that when cleared would not delete from the display nor would the machine operate until I unplugged the machine for around eight hours. I guess it is a sort of reset or reboot.

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Check whether the inside is perfectly clean - it might be that while you were trying to fix the jam, some paper was left stuck inside. Otherwise try disconnecting the printer from the power supply to allow it to reset.

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My laserjet 1020 develops a paper jam after printing the first page of a multipage print instruction .I have deleted the printer and re-installed it including all drivers but problem still...


Hi,
Reinstalling the printer is related the Software.
If the paper gets physically jammed than its the driver setting issue or hardware issue.
Check if two sheets get jammed or only one sheet.
If it is two sheets than printer is picking up multiple sheets and paper gets jammed.
If the printer is jamming a single sheet than remove the Tray and look there is rubber roller inside if there are marks or lines on that rubber roller or if the roller roller is worn out than that rubber roller called as paper pickup roller need to be replaced.
If that looks fine than try to priny using manual feed and if the problem persists from manual feed too than try another toner cartridge
If the problem is not from Manual feed Tray that Replace the main Tray with known good Tray and check if the issue resolved.

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Oki C9300 - paper keeps jamming in the 2 same places, reads either 383 paper jam or non paper sense error. All drums and tonners are new, paper is loaded.


your getting a 383 paper jam, find paper in two different places.
See if it's a duplex related problem. print single sided documents, if that works, try printing two sided documents (it'll be the duplexer) if it only fails while printing duplex.

Also, check the back door. Make sure the back exit tray is closed all the way.

You can also have a paper jam in the duplex unit (open the front door), the duplex unit slides out the front. You can easily remove the duplex unit and run the printer without it.

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1 Answer

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hi i am having roughly the same problems i use cad and have not even managed to print that far yet what windows are using?

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