Question about HP LaserJet 2840 Printer

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Restart needed, calibrations

Every so often the machine gets stubborn and simply doesn't do anything when I push the 'copy' button. I have to turn the machine off and on again, then it goes through this whole 'calibrating...' routine and then it works again. Any ideas?

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Re: restart needed, calibrations

Do a manual calibration from printer display (yes, on printer)
3-4times without pause between. That should solve it! It means something is out of sync. Worked for me.

Posted on Mar 27, 2008

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Re: restart needed, calibrations

Hey there. Try Up-grading the firmware (U can check if is the latest by printing a config page). Other things to do - replace the USB cable (if U're using it locally) - the USB cable must have under 1.8 m and should be shiended otherwise should have filters on each end.

Posted on Mar 18, 2008

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Touch screen stops working

common problem. might need tho be calibrated. turn off front power switch and then the rear main power switch. turn on the front switch, hold down energy save button and copy button, turn on rear switch and continue to hold energy and copy buttons until the screen displays an X in the top left of the display. immediately release the buttons and touch the X with a pen/pencil/pointed object. the X will move to the center and them to the bottom right of display. touch the X as it moves position. the copier will reboot and the display may work. if not, replace the touch screen. part #n2baayy00771.

Sep 13, 2014 | Panasonic WORKiO DP-C322 Printer

1 Answer


A hard reset of the printer may clear the error. Here is how to perform the hard reset:
1.Shut down the computer.
2.Open the top cover of the printer and remove the print cartridges.
3.Close the top cover of the printer.
4.Press the power button on the printer to turn the printer off.
5.Disconnect the communications, (USB or Parallel), cable from the back of the printer.
6.Disconnect the power cord from the back of the printer for one minute.
7.Reconnect the communications cable to the printer.
8.Reconnect the power cable to the printer.
9.Press the printer power button to turn the printer on.
10.Open the top cover and reinsert the print cartridges.
11.Close the top cover and print the calibration page.
12.Restart the computer.

Let me know if you need more help

Mar 04, 2011 | Canon PIXMA MP190 All-In-One InkJet...

1 Answer

We have a canon np6551 copier that was given to us but when it is turned on it warms up and says ready to copy but when you touch the screen or try to set number of copies or push start nothing happens.

More than likely the Start button is faulty. Push it harder to see if this works, if so then the start button needs to be replaced. This is actually a common break down simply because that button is the most popular button on the control panel and it is the first to pack it in.

Nov 22, 2009 | Canon Printers & Copiers

2 Answers

EasyShre 5300 printer just put in new ink and wont print black and only color i get is purple

please check black ink is there or not
please reinsert the black catridge
restart the printer

Oct 31, 2009 | Kodak EASYSHARE 5500 All-In-One InkJet...

1 Answer

I have a problem with my TOSHIBA DP8070 coper. i get error message: IQC service call recommended " the print quality is very poor

this happens during automatic color calibration, more than likely you need new color developer installed by a technician. turn machine on holding the 0&8 buttons to enter service mode type 4546 and 0 then start and 556 and 0 (start) 557 and 0 (start), then hold interrupt it will beep 5 times and shut down, this will turn off the calibration and allow you to make copies but will not improve quality.

Aug 06, 2009 | Printers & Copiers

1 Answer

Printer will not copy although we can still print documents sent from the computer.

Is it infax mode?
Do you get a green Start Button?
Are there any error codes diaplayed when you push the button?

If no to these, unplug the machine for several minutes and restart.

Hope this is of some help

May 19, 2009 | Sharp Printers & Copiers

3 Answers

Paper error

I hope that this can help someone else as it has taken me all day to fix this issue on a C6180 all-in-one machine. I will ignore the normal solutions to a "paper mismatch" error such as your settings not matching your printing media. Obviously, check these first:

If your problem is not solved with the above steps, you have an issue with your "spot sensor" and it needs to be calibrated. Instructions:

1. Press * and # at the same time, and then release both keys.
The display reads "Enter Special Key Combo".
2. Press 3, 2, and then 9, releasing each key before pressing the next. 
The display window should read "Service: R0622M" with a revision number. 
3. Press the right arrow button once.
The display should read "System Configuration".
4. Press Enter or OK.
5. You will be prompted to enter serial number. Do not enter any information
on the unit.
Press the right arrow button until "media sense calibration" appears in the
6. Load Paper into the unit and then press Enter or OK.
7. Media Sense Calibration process will take place.

It is one of the rare times that HP chat has fixed my printer at no cost and instantly. Here is a full transcript describing my issue and the HP chat solution:

Nov 11, 2008 | Printers & Copiers

1 Answer

Printer does not make black copies, it will print colored copies but not black kodak 5300 aio printer will not print in black. ink cartridge new.

Remove the black and color ink cartridges.
Right above where the black ink cartridge was, in the top left hand corner of the printhead, push up towards the ceiling and you should be able to push a button that releases the printhead.
Place the printhead right back into the printer and push straight back on the back wall.
You should hear a loud snap.
Replace the ink cartridges which should snap as well.
Close the printer.
After about a minute or so the printer will ask you to do a calibration.
Insert a paper and press start.
Scan the calibration sheet.
After that, in the menu, do a printhead clean.
Do one basic and one deep.
Print a demo sheet to see if anything has changed.
If the picture looks better, continue to do cleans.
In the event that it does not, the printhead will need to be replaced and since the printer is still under warranty, Kodak specialists will try to overnight you a printhead.
The whole process is short and free.
The number for Kodak AiO Support is 1 800 421 6699.

Aug 26, 2008 | Kodak EASYSHARE 5300 All-In-One InkJet...

3 Answers

Not printing

cancel all the pending documents pending in the print queue.then try

Aug 16, 2008 | Kodak EASYSHARE 5300 All-In-One InkJet...

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