Question about HP DeskJet 640c InkJet Printer

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Printer colour all wrong!

My printer started printing my images with a blue hue covering the whole image...I changed the cartridge, it didn't help. I realigned the cartridge and cleaned the heads still no joy. Any help would be most welcome as I am clueless as to what to try next. Thanks in advance for any help.

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  • Anonymous Jan 31, 2009

    Im having the same issue. All my prints have this blue-ish hue to them. I dont understand why... Not long ago, it was printing just fine. As soon as I changed the color cartridges (twice) it gave out this blue hue. This is only apparent with photo paper. But when I print with regular paper, the blacks are fine. :0(

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What application are you using to print the image? Can you access the printer properties tab and see if there is am image setting option. You might need to adjust the color correction option.

Posted on Jul 27, 2007

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Posted on Jan 02, 2017

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Hi i just bought a second hand konica minolta c350 and when i print something it is notting enough clarity. please anybody can help me .


I would first starts by removing the Imaging units that are locked with blue levers below toner cartridges one by one for each colour and use the cleaning tool that is provided on the door (metal rod with handle and a pad on the opposite). When you pull the Imaging unit all the way out, you will see inside a long strip of LED and next to it on left hand side about a 1-2 cm another strip of MICRO LED Array. This is essentially yor print head and it has to be spotless clean. Use the rod and padded end to clean each of the arrays. This will give better sharpness and clarity to your prints. Then put Imaging Unit back in machine and pull the blue stick from the Imaging Unit out-in-out-in. The next step is to do Stabilisation and Gradation adjustments. This can be done in Service Mode. This should improve your printing. If it doesn't then you have either worn Imaging units _or_ Transfer Belt _or_ incorrect settings on Fuser or Fuser being worn.

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Colour prints coming out with a lilac hue


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Lexmark Z615 inkjet printer - whetther I print in colour or black and white, I am getting whole lines of text/image missing. When I use the "clean nozzle" function some of the colours - like...


The problem with your printer is the print head. Usually you have to run the clean nozzle thing 5 or 6 times to clean the print head nozzles and if there's still no improvement after that then print head needs to be changed for the printer to work properly. The bad news is that a print head costs almost as much as a new printer.

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I have a hp 3310 wireless. It prints in colour well but if you print in black most will be not clear although a line every so often is printed clearly. If you print the same document the same lines...


What you are trying to print is created in RGB. This means it is a photo that has been created in a color format that will ONLY print if you print it in full color. If you try to print your photo item in only black, it will only print what it sees in TV Colors, a combination of RED GREEN BLUE. This is why you will only get part of the image printed when only in black.

The only way to change it to print the whole image in all black, is to open the image you are trying to print in Photoshop or another professional grade photo program, and to change the settings of the image to CMYK, effectively, Cyan, Magenta, Yellow, Black. Then, change the image once again - to GREYSCALE. This will effectively change all the colors to a SHADE OF GREY, in different HUES.

Save the picture as a JPEG, and then print from the desktop, from your picture viewing software that came with your computer, and you will see everything print out from the black ink, in greyscale.

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1515n - I have the Magenta colour 'shadowing' the blue test. A mirror image of the blue text. [slightly staggered] Black is fine. Applies to all Word docs when printing in blue - can you help please?
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Jules Radstock

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Hi there can you help with my HP2605? Since i replace a blue cartridge (a compatibal one. We have been using compatible cartridges for over year and so far so good.)3 weeks ago the printing is not week....


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well you must use the correct ink, you use a very thin ink, that´s way it´s bleeds, the ink is very metal corrosive, and destoy al mec. parts and bunsout the print head. NOTE:you have ruined your printer, the repair is very expensive.

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No Yellow will print


If you haven't used it for a long time the ink may have dried up. You can try taking out the cartridge and letting it sit on an hot wet rag for a while to unclog the print heads. Try not to touch the copper contacts on the cartridge. If that doesn't work you may be out of yellow ink.

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OKI c5400


Assuming that you are using the same paper and have not changed any of the consumables you should do the following:

1. Clean LED head with lens cleaner or soft tissue.
  1. Remove the toner cartridge and give it a few shakes then reinstall it.
  2. The Toner Could be low so Change toner cartridge.
4. Make sure that the paper is not damp as this will cause fading and poor quality printing and images.
  1. The image drum may have been light contaminated so remove it from the printer and store it in a totally dark place for several hours then reinstall it.
  2. If the image drum is dirty then wipe it very gently with soft tissues, being careful not to scratch it.
  3. Open the top cover and check to be sure that each toner cartridge is fully seated and that each toner cartridge lock lever is pushed all the way back.
  4. Press the top cover release latch and open, then close, the cover.
  5. Check MEDIA MENUTRAY1 MEDIA TYPE and set as required. Do the same for TRAY2 and MPT.
  6. Check MEDIA MENUTRAY1 MEDIA WEIGHT and set as required. Do the same for TRAY2 and MPT.
  7. Possibly set the value of media weight in the menu to the next heaviest one.
  8. Check PRINT MENURESOLUTION setting and set to 600 x 1200DPI
  9. Check PRINT MENUTONER SAVE MODE and make sure this is OFF
  10. Check PRINT MENU – MONO PRINT SPEED and make sure this is set to MIXED SPEED
  11. Check the COLOUR MENU – DENSITY CONTROL and set this to AUTO
  12. Check the COLOUR MENU – AUTO DENSITY and set this to EXECUTE
  13. Check the COLOUR MENUCMY 100% DENSITY is set to ENABLE if you want a glossier black finish.

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1 Answer

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