Question about Canon imageCLASS MF4150 All-In-One Laser Printer
This problem bugged me for months! Selecting CONT. PRINTING as indicated by Small6363 allowed to print with the warning light on but did not solve the warning light problem. I eventually found a way to bypass the flashing light and warning message.
Underneath the cartridge, on the cylindrical portion, in the middle there is a small flat rectangle. This is the ink level detection spot. Cut a piece of aluminum foil of the same size and place it with a piece of scotch tape overt that flat rectangle. Voilà! No more flashing red light and no more out of toner message! Of course you have to monitor your level visually and change the cartridge when printing starts to fade.
Hope this helps!
Posted on Jun 25, 2011
Same here, on my MF4150D, the foil over the flat rectangle cut out, did not work. I placed a magnetic square (cut from a magnetic fridge decoration) and taped it over the rectangle...WORKED!
Posted on Jul 26, 2013
Patrick's solution is spot on. I'm not sure why it works (I doubt the machine contains a strain gauge THAT sensitive), but it does. Three cheers for Patrick!
The "small rectangle" is on the toner cartridge, not the machine. Pull the cartridge out, turn it over, and look for an indentation 16 x 11 mm (about 5/8 x 7/16 inch near the center. Cut a piece of foil 15 x 10 mm, tape it on with ordinary cellophane tape (Scotch brand works well), and Bob's your uncle.
Posted on Jun 18, 2012
I used small round magnet and tap it over the rectangle area. The problem solve! :D
Posted on Apr 26, 2014
The foil trick did not work for my MF4370dn Canon printer. BUT a thin magnetic strip secured with tape placed in the small flat rectangle did! I cut-out a piece from the magnetic backing of a decorative item that was magnetically held to our refrigerator door. A magnetic business card or similar may also work. You can also find these strips/rolls in the crafts section in most stores. Pretty much any magnet should work so long as its thin enough.
Posted on Mar 07, 2013
Foil did not work (MF4150) small rectangle cut from a refrigerator magnet did work. Excellent! (Also updated the firmware - that didn't work!)
Posted on Feb 20, 2014
I have an Imageclass mf8180c and after putting a piece of foil over the clear window at the back of the cartridge the message changed from "change Y cart" to "print not guaranteed - check Y cart" and allowed me to print again. This will certainly carry me over until the new cart arrives!
Posted on Nov 02, 2013
Neither of the two solutions listed above work for me. I am using a compatible aftermarket toner cartridge which worked fine for a while and then suddenly I got this toner message despite the cartridge being nearly full still. The foil trick worked for a few days but not a permanent solution.
Posted on Jun 30, 2012
Did this with an aftermarket toner cartridge (104) for MF4370dn and it worked like a charm (the magnet taped solution). The "cutout" is just an indented squarish space on the bottom of the toner, a little smaller than a small postage stamp.
Posted on Apr 20, 2020
Just added the small magnetic strip to a Canon Cartridge 104 on a Canon MF4360-4390. Error light disappeared. Nice trick.
Posted on Mar 14, 2015
So far so good on MF4350d
Posted on Oct 19, 2014
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