Question about Brother MFC 420CN All-In-One InkJet Printer
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: black ink not printing
Fix ink cartridge
I had same problem. I must have ran the clean cycle more than 30-50 times over a period of days. That never made any difference. I was about to toss the whole thing but figured I would try one more thing. If it didn't work I would be in no worse shape. Here is what I did.
Took an almost empty black cartridge and inject a lot of 100% Acetone to dilute ink. Left some black in it since I didn't want to think it was empty. Inserted this cartridge and ran the cleaning a few time. IT WORKED. I used my word processor program and filled a page with large bold font characters and printed a page or two. Each page cleared more nozzles. After doing this cleaning/printing a number of time, I put in the full good cartridge. Ran the cleaning a few time to eject any of the Acetone diluted ink. Ran the printed page a few time to remove more of the diluted ink.
Everything seems to work now.
Posted on Dec 20, 2008
SOURCE: printer won't print black ink
From multiple online sources, this appears to be a fairly common problem with this model. As a matter of fact, my 490CW is experiencing the same exact issue. Called tech support and they're issuing an exchange. I'd advise that you do the same.
Posted on Oct 12, 2009
Try cleaning the black printer heads several times in a row, at least 5 times then print a black document with best quality setting.
Press the ink button, then down to select select cleaning and then press menu/set and menu/set again to select black.
Posted on Jan 08, 2010
Get a syringe, remove the needle, remove the ink cartridge and use the syringe to blow air GENTLY through the hole the cartridge connects to. Make sure you have a cleaning cloth to remove ink dislodged from pipe connected at the print head, do this gently to remove any obstruction and there should not be too much mess and can easily be cleaned up.
Posted on Feb 04, 2010
Tips for a great answer:
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Follow these instructions when the ink level is low.
Note When the ink level for the print cartridge is low, a message appears on
your computer screen. You can also check the ink levels by using the software
installed with the HP All-in-One.
When you receive a low-ink warning message, make sure you have a replacement
print cartridge available. You should also replace the print cartridges when you see
faded text or if you experience print quality issues related to the print cartridges.
To order print cartridges for the HP All-in-One, go to www.hp.com/learn/suresupply. If
prompted, choose your country/region, follow the prompts to select your product, and
then click one of the shopping links on the page.
For a list of print cartridge numbers, see the back cover of this guide.
To replace the print cartridges
1. Make sure the HP All-in-One is on.
Caution If the HP All-in-One is off when you open the print cartridge door
to access the print cartridges, the HP All-in-One will not release the
cartridges for changing. You might damage the HP All-in-One if the print
cartridges are not docked safely on the right side when you try to remove
2. Open the print cartridge door.
The print carriage moves to the center of the HP All-in-One.
3. Wait until the print carriage is idle and silent, and then lightly press down on a
print cartridge to release it.
If you are replacing the tri-color print cartridge, remove the print cartridge from the
slot on the left.
If you are replacing the black or photo print cartridge, remove the print cartridge
from the slot on the right.
28 HP Deskjet F300 All-in-One series
Maintain the HP All-in-One
1 Print cartridge slot for the tri-color print cartridge
2 Print cartridge slot for the black and photo print cartridges
4. Pull the print cartridge toward you out of its slot.
5. If you are removing the black print cartridge in order to install the photo print
cartridge, store the black print cartridge in the print cartridge protector or an
airtight plastic container.
If you are removing the print cartridge because it is low or out of ink, recycle the
print cartridge. The HP Inkjet Supplies Recycling Program is available in many
countries/regions, and lets you recycle used print cartridges free of charge. For
more information, go to the following website:
6. Remove the new print cartridge from its packaging and, being careful to touch
only the black plastic, gently remove the plastic tape by using the pink pull tab.
1 Copper-colored contacts
2 Plastic tape with pink pull tab (must be removed before installing)
3 Ink nozzles under tape
Caution Do not touch the copper-colored contacts or ink nozzles.
Touching these parts can result in clogs, ink failure, and bad electrical
User Guide 29
Maintain the HP All-in-One
7. Slide the new print cartridge forward into the empty slot. Then gently push on the
upper part of the print cartridge forward until it clicks into the socket.
If you are installing the tri-color print cartridge, slide it into the left slot.
If you are installing a black or photo print cartridge, slide it into the right slot.
8. Close the print cartridge door.
9. If the print cartridge alignment sheet prints, load it on the left front corner of the
glass with the top of the page to the left.
10. Press the Scan button.
The HP All-in-One aligns the print cartridges. Recycle or discard the print
cartridge alignment sheet.
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