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Posted on Feb 28, 2011
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Canon i850 printer has has message saying print head unknown. Will not print . Trying to print DOS information

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  • Expert 125 Answers
  • Posted on Feb 28, 2011
Anonymous
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Joined: Jul 23, 2010
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Use original canon i850 tonner, also remember exact number of catrige.

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Related Questions:

0helpful
1answer

How to fix a defective print head on canon i850

Purchase the print head from ebay approx $35.00, install[simple drop in installation], then you will be up and running.
0helpful
1answer

Printhead location unknown on a canon 850i printer is what the fault indicates

Check the contact area of your print head.. sometimes if ink get into the area.. it will give an error.
Make sure you clean the area behind the print head.. and see if there is any dirt or ink at the contact area on the printer, clean with some slight alchor ..
0helpful
1answer

I have problems aligning printer heads on my Canon i850. I have clean the printer heads, replaced cartdridges, re-aligned them, but I still get lines through the printed material (phots mostly). No...

Please try to uninstall and reinstall your printer.

Clean your printer heads.

Perform a hard reset to your printer.

Print a test page.

Try using a different bond paper.

Make sure you are using original canon cartridge

If still you get an error. Replace your printer heads.
3helpful
2answers

Canon i850 printing but pages are blank

I had the same problem after changing the black ink cartridge. I went to Control Panel of my computer, chose Printers, then Canon Inkjet. Chose Properties, then Maintenance, the Deep Cleaning. NOW my printer is working!!
0helpful
2answers

7 yellow flashes not printing

hi welcome to fixya!
I believe there is no print head failure happening. I experience that one time, it only needs a new ink cartridge. Be sure to replace the right color!
have a nice day!
4helpful
1answer

Print head problems 7 yellow lights 1 green light, how do I fix

That's not a printhead problem, it's saying that the waste ink absorber is full. You need to have them replaced at a shop where they can also reset the waste ink counter.
0helpful
1answer

I850 printer error message 5100

GO ONLINE AND TYPE IN

CANON 850i PRINTER ERROR MESSAGE 5100

ENTER

ROD
0helpful
1answer

Every 4th or 5th line does not print

try running your maintenance program.
go to your printer settings
right click on canon i850
left click on properties
run cleaning or deep cleaning,
then print head alignment and/or nozzle check
0helpful
1answer

Will not print

Remove and re-seat the print head. If need be the print head can be cleaned with hot water. YMMV but I've submerged my i850 print head for minutes at a time. Dry it off, blow it out, and it goes right back to work. Common problem if you're using non-Canon inks.
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