Question about Brother MFC 490cw Color Inkjet Multi-Function Printer
I don't know if this will solve your exact "cannot detect" problem, but it solved mine.
Problem: Cannot detect
Like other posters in this forum, I replaced all four of my ink cartridges at the same time when my MFC-490CW said they were all low. After I installed 4 (third-party brand) cartridges, the display said something like "Cannot detect ink cartridge, re-insert slowly" and indicated the cyan cartridge. Like many others, I tried this many times. I tried turning the power off, unplugging the power plug from the wall, different sequences of cartridge insertion, etc. None of this helped.
Solution: Clean the sensor
Much has been written here and in other places on the 'net about the trick of using electrical tape on the ink cartridge in the ink-level sensor window. I remembered seeing a good deal of ink on the outside of the cartridge as I removed it. This leaky ink cartridge had somehow coated either the sensor or it's associated light with blue ink, rendering it unable to detect the presence of a cartridge. I was able to clean the sensors with some Q-tips and isopropyl alcohol (not the optimum technique, but it was effective). Just to be sure, I swabbed the other sensors as I had removed all the cartridges to make room for my fat fingers. All sensors swabbed clean. The cyan was the only one covered in ink. I swabbed the cyan sensors with the alcohol until they were clean (maybe 20 Q-tips all total). I carefully dried the area with the Q-tips and let the alcohol evaporate for a minute then re-installed the ink cartridges...and printed a document. Yay!
As I said, this may not solve your particular "cannot detect" issue, but give it a try. It is a little messy but I'm back in action and hey, tattoos are hip. I just won't tell anyone why they're all the same color of blue and why I tattooed my fingers.
Posted on Jan 28, 2011
Thank's got the same problem on my Brother MFC-6490CW, I follow your trick I used isopropyl 70% half and half water, but I unplug the unit first, it's took me 8 qtip and I also clean each extension ink thank with the same solution and not only now it's detect back the cartridge but give back the right level of ink! Thank's was a cheap and quick fix work perfectly now!
Posted on Mar 07, 2013
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Posted on Jan 02, 2017
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