Question about Brother MFC790cw All-In-One InkJet Printer
Try printing a rest page and if that doesn't print in black ink the printhead is probably blocked.
With some printers the printhead is part of the ink cartridge and such problems tend to disappear when the cartridge is replaced, unless the cartridge is faulty. Other printers use cartridges that are ink and nothing more and those are prone to the printheads drying out and becoming blocked unless they are never allowed to become completely empty of ink and are kept in frequent use.
Cleaning/replacing such a printhead usually needs special tools and experience and in the case of many cheap domestic printers the cost of service far outweighs the cost of replacement.
Posted on Aug 13, 2017
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Posted on Jan 02, 2017
there are no instructions that you would understand and once the print head is clogged up, you can noy mannually clean it , it has to be replaced! sounds like you are using generic ink!
Posted on Jan 17, 2009
If the regular cleaning does not work, you can try the power purge. Perform it by doing the following:
Posted on Jun 05, 2009
You probably have a plugged print head or the black ink feed is plugged.
Depending on how bad it is you may find it easier or even cheaper to replace the printer.
If this is a ink caused problem you stand a chance of fixing it if you are patient but you might go through half an ink cartridge to get it working, If it is stubborn it can take 20 or 30 cleaning cycles before you see any black. You can try using household vinegar (dissolves the dried ink) on a qtip or lint free paper towel to try to clean the print head. To do this you remove the ink cartridge and very gently rub the towel with the vinegar on the print head. This might require you to move the print head to one side so you can see the actual print area (where the ink comes out). Keep doing this until the towel starts to come clean ie not as much ink coming off. Then run a few print cycles and if this works your printer will print as good as the first day you had it.
The next stage would require filling a old clean ink cartridge with vinegar and running cleaning cycles. Usually can be pretty messy and you should rethink buying a new printer but will really clean things out.
It is also possible that the print head has picked up clay or paper lint from the paper and this has hardened like a cement. That means replacement.
Posted on Aug 17, 2009
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