HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting

And if they were repairing rather than throwing and change? Rediscover the pleasure of the repairs yourself. How to diagnose a problem or find spare parts? Repair itself is way to save money generally!
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HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by Christophe » 25/12/21, 14:37

Is there a laser printer repair and maintenance specialist here?

For a few days now my HP2840 from 2007 has stopped working ... it only prints blank pages without an error message.

I am all the more annoyed that I had bought more than 100 € of toner and drum at the beginning of December. Throughout her life I think she must have printed between 50 and 80 pages ... (it may be indicated in the stats ... to see)

Let's say it's like my saab, an old lady who needs a little attention! : Mrgreen:

HP2840.jpg
HP2840.jpg (227.1 KB) Viewed 12054 times


History of the failure:

a) In November I noticed a few blank pages when I printed the same .pdf of ten pages in a row 3 times ... (always the same blank pages but they were printed individually afterwards. ..I thought about a PC bug ...)

b) At the beginning of December I could no longer print pages with a high fill rate at all (i.e. the text was still printing but not a page where there was a photo or a complex diagram with a lot of fills black: she came out a virgin)

c) Since then I have read the manual (350 pages) which is still on the HP site https://support.hp.com/ch-fr/product/hp ... 97/manuals

I looked at the forums and websites on this model or other laser, I have tried "everything" and nothing works.

In short, I did not succeed in relaunching it with the basic advice (I have not pushed very far either for the moment ... hence this subject) ... and it is quite difficult to find information and HP2840 users considering the age of the machine ...

d) It's not a network or PC problem because the internal reports no longer print either ... I just have, from time to time, a few (bad) colors and that on the left of the page on a column of about 3 cm ...

e) Obviously I tried to interchange drum and toner with the new ones (3 black toners tested ...)

f) I did several cleaning and calibration cycles following the worries at the beginning of December ...

In my opinion it looks like it is the laser which no longer works well but without any certainty (there is no "powder" or traces on the pages that come out) ... But it still heats up (we can access it easily) and no internal error message: normally this failure must be reported according to the manual ...

In short I dry well, hence this subject!

Does any of this speak to anyone?

She is 14 years old ok she may have had her day but I would like not to have to throw it away if it is not too difficult to repair (I want to put 100 € or 150 € of parts in it but no more ... ) ...

In short, a Christmas gift to Earth ... 8)
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by GuyGadeboisTheBack » 25/12/21, 14:47

You can try a factory reset * and if it is not done update the firmware **.
* http://www.ordinateur.cc/Mat%C3%A9riel/ ... 24599.html
** https://support.hp.com/be-fr/drivers/se ... del/445197

Otherwise I found this answer on a forum (in English language):
The solenoid that controls the movement of the carousel sticks, which drives the initial position of the carousel. The laser scanner beams actually hit the black plastic carousel instead of the cartridge drums, resulting in blank pages with no error codes. This was an older color machine that did not have the error code 59.xx (transfer belt movement errors) which is currently on the list of error codes for newer HP color printers. . This solenoid is not that difficult to reach. Simply remove the sticky substance (self-explanatory once you get there). When cleaning them I used blue duct tape on the sticky areas when reassembling which works for me but you can do anything ... just peel off the sticky !!
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by Christophe » 26/12/21, 12:08

OK Thank you guy I'm going to try the solenoid thing because it corresponds well to my concern ...

But I didn't quite understand where it was, do you still have the original url?
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by Christophe » 26/12/21, 16:16

There I feel the solution arriving!

Indeed I had to force a little when changing the 1st toner, which may have shifted the carousel!

I will do what is shown in the video! 8) 8) 8)

Guy you rock!
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by GuyGadeboisTheBack » 26/12/21, 16:30

Christophe wrote:Guy you rock!

As usual... 8) : Mrgreen:
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by Christophe » 28/12/21, 13:35

As usual, as usual, it's easy to say ... I can't say, I don't know your wife! : Mrgreen: : Mrgreen: : Mrgreen:

Well I did the manipulation this morning by following your first 2 videos (the 3rd is out of order) ... there is better 8) 8) 8) but I still miss the cyan and the black ... (there was cyan in the print area of ​​the 3 cm on the left ...)

First printing test, the 2 working colors seem to work quite well ...

HP2840_test.jpg
HP2840_test.jpg (179.79 KiB) Viewed 11868 times


Photos of the manipulation

We clearly see the defect before alignment:

HP2840_mangenta.jpg


HP2840_decouverte_caroussel.jpg
HP2840_deverrouillage_caroussel.jpg (329.72 KiB) Viewed 11868 times


14 years of use it gives that (if these colors make you think of someone on the forum it's normal... : Mrgreen: )

HP2840_bac.jpg


After alignment:

HP2840_mangenta_alignment.jpg


I am quite surprised by the quantity of powder wasted in the tank ... there is more than 5 mm of yellow in places! : Cry: : Cry: : Cry:
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by Christophe » 28/12/21, 14:19

Guydounet victory !!

HP2940.jpg
HP2940.jpg (137.29 KB) Viewed 11855 times


Finally half victory because the 2nd impression to confirm the victory did not work :( : Cry:

A hint: the page that printed well was "curled" ... and not the others ... wouldn't there be another laser problem? : Shock: : Shock: : Shock:
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by GuyGadeboisTheBack » 28/12/21, 14:21

Don't ask me too much, eh! I can't do much and my laser printer is very recent, and B&W, and not of the same brand. : Lol:
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Re: HP2840 crashed which prints blank pages without error message? HP Color LaserJet Printer Troubleshooting




by Christophe » 28/12/21, 14:25

In the status report I think we have the number of pages printed in total, in the 71500?

I'll check the manual ...

This is according to the config page:

Number of pages

Total printed pages: 71491
Monochrome pages printed: 60910
Color pages printed: 10581
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