canon: toner not set
I’ve had to deal today with a strange error on a Canon MF4150. The toner was recently refilled, and on a print attempt the green light turned red and the following message appeared: toner not set / insert toner. I’ve extracted and reinserted the toner, restarted the printer, changed the toner, nothing worked.
After some Google search, I found out that the solution had nothing to do with the toner. Some times paper gets stuck in the tray and fools the printer into thinking that the toner is missing.
To fix the problem, take out all the paper from the tray and restart the printer. Job done 
December 19th, 2008 at 14:37
“Some times paper gets stick in the tray and fools the printer into thinking that the toner is missing”.
Nu e “gets stuck”?
December 19th, 2008 at 15:02
era typo… am corectat
May 12th, 2011 at 3:31
THANK YOU!!! I had the same message, bought new toner (even though the old wasn’t that old), and still had the message with the new toner. I found this, followed your directions….and wah-la, message gone!! Thanks again!!