Question about HP LaserJet 2420 Printer

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Blank papers i replaced a new toner/catrdge , prints blank test pages and and any other job.

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  • boned Sep 05, 2007

    actually i was replacing the new toner as a troubleshooting activity which proved that all my cartriges are fine. i nid help on what nids to be done on the printer itsels as i am now striping it.
    note: first it was printing faint half blank pages and i tried 2 new cartridges.

  • boned Sep 06, 2007

    am sure the drum is ok(replaced toner 3times) ,the fuser is might be ok n i dont know about the(paper comes out hot from the printer). am not sure if the laser beam is being shot to the mirrors. help and say someting if u do not understand my problem

  • Anonymous Mar 27, 2014




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Try again the old toner cartridge if you still have it. Even though the print quality might be bad, see if there is a printout. If the page is not blank like the others, that is an indication that the new cartridge is defective and has to be replaced.

Posted on Sep 05, 2007

  • Marcelo Pastorino
    Marcelo Pastorino Sep 06, 2007

    One way to check if the laser part is working is print a test page and open the printer cover when the paper is half way throgh. Take the toner cartridge out and inspect the drum. You should see part of the test page on the drum (loose toner forming the printout).
    In this case, I would suspect something is wrong with the high voltage power supply.
    If the drum has no image on it, then something is wrong with the laser beam or the mirror.



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My HP 2420 had a paper jam. I played around with it and must have cleared the path although I did not see any paper particles fall out. (I did have a jam and figured a small piece must have been left...

Check the following steps for fixing Hp Carriage Jam Error :

Open the print carriage access door. Check for any packing material that may be blocking the internal components. Check for an orange shipping lock that may still be in place on the left side. Pull the shipping lock out, if present, and discard.

Remove and reinstall the cartridges to make sure they are properly installed. Lift the front center of the print carriage access door to open it. Lift the door up until it locks into an open position. Press down on a print cartridge and allow it to spring back up. Lift the cartridge out of the printer. Do the same for the other cartridge. Slide the black cartridge into the slot on the left and the color cartridge into the slot on the right. Press down on each one to lock it into place. Lower the print carriage access door.

Check the print cartridges to make sure the protective tape has been removed from the ink nozzles. Remove the cartridges from the printer. Remove any tape or labels. Replace the cartridges into the printer.

Push in on the tab on the left side of the clean-out door on the back of the printer to open the door. Lift the door out of the printer. Check for any paper jams. Jammed paper can block the printer cartridge carriage from moving. Pull any jammed paper out.


Oct 15, 2010 | HP LaserJet 2420 Printer

1 Answer

My hp1012 is printing dark with shading on the pages and shadow or echos. Can something be replaced or fixed?

with this issue, you pretty much have to run a half way test unless you have the convieniance of another toner to try. basically, it's either going to br your toner or your fuser and a halfway test will determine this if you don't have another toner to try.

The Half-way Test

You will need to print a page and open the toner lid when you think the paper is underneath the toner cartridge. This will stop the printing so you can pull the toner cartridge out and look at the partially printed paper. It may take a few tries to time this test correctly so the paper stops under the toner but not completely into the fuser.
1. Print a test page from Tray 1, the "fold-down" Multi-Purpose tray on your printer.
2. Just as the test page completely disappears into the printer, open the toner lid door. The print job will stop, sensing an error.

3. Pull the toner cartridge out, and you will find the test page sitting directly underneath the toner.
4. Carefully remove the page by gently pulling the page upwards & free from the toner cavity. Careful! The toner has not yet been fused to the paper, so the print can be somewhat messy on your hands and may smudge easily.

Examine the printout.
1. If you do not see the print defect on your test page, that means the defect is being added later in the print process by the fuser. Fusers are the main component in a maintenance kit; click here to view our selection of maintenance kits for various LaserJet printers.
2. If the print defect is visible on this printout, that means the print defect is occurring before the fuser. Try replacing the toner cartridge (click here to view our selection of toner cartridges).
If you determine the print defect is occurring before the fuser, and swapping toners doesn’t fix the problem, there could be several things causing the problem. In the order of most likely to least likely: you could have two defective toner cartridges, the transfer roller might be faulty, the laser scanner could be dirty or defective, or the high voltage power supply could be bad. You might want to email or call since these scenarios are not as common.

Order Fuser Here!

Order Transfer Roller Here!

hope this helps and if so please mark FixYa!!

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Are you getting toner on the paper? To find out, print a test page. When you judge that the paper is under the toner cartridge, turn the printer off and look at the toner cartridge. Is your document displayed on the toner drum in toner? Is there toner on the paper?

No No Replace the toner cartridge. If that doesn't work you have more serious problems.

Yes No Replace the transfer roller.

Yes Yes If toner is smeared on the paper, replace the fuser.

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