Brother Waste Toner, new unit not recognised. WT-220 WT-223 

Thanks so much for this video, it saved me buying a new printer! I had recently bought a genuine waste toner box for my for my Brother MFC-9335CDW printer and it worked very intermittently with the message saying the waste toner being full (switching the printer power button off/on seemed to clear the message for a short period of time), until the message never disappeared after two weeks of use, which meant I could no longer print. The two plates were already touching together when opened the first cover, so problem there. The second cover was not loose or moving, but I decided to tighten the screw really tight and this WORKED! Please note that after doing this and re-installing the waste box immediately, the printer did not detect it initially and the message still appeared, but after coming back about 12 hours later, the printer has decided to recognise the waste box and I have not had a problem ever since. TL;DR: Tighten the second cover's screw really tight!

THANK YOU SO MUCH! My Brother finally reached a point where I could not print at all with the dumb error even after I cleaned out the WT box. And this finally fixed it!!!

Thank you so much for making this video. After I remanufactured the contacts on the side of the newly purchased genuine waste toner cartridge, I was running again MFC-L3750cdw. Simply turning the screw in my case was not enough, but by removing the metal part under the side plastic shield and giving it a small bend and reassembling ensured it made contact reliably.

Thank you so much for this. I’ve been tearing my hair out trying to get the new toner box to register.

You are the man!! That was excellently described. Thank you for putting this together!

very tanks for this video , this yes help , the contact of toner residual and print is dirty , only clean contact of thoner residual and good , very thanks

Thank you so much for this! Was at a loss.... quick turn of the screwdriver fixed the problem!

You Legend! Thank you so so much! i was wracking my brains out until i found your video! Thank you once again!

Thank you. This worked. I really appreciate you making this video.

thanks for this; tightened the loose screw, totally fixed my problem

Hi, everything is spotless and I checked for 0 resistance as per your instructions but I still get the "WT box ends soon" message.?

Oh my gosh IT WORKED!~ Thank you SO MUCH YES!!

I followed the other videos for resetting WT Box but it did not work. Now, I know the principle of it. I followed your instruction and bend that metal sheet a little bit to increase the contact force at that contact point. It is fixed. Thank you!

Tried this and also replaced the waste toner box but still am getting the error. Also, when I power cycle the unit I get a "paper jam" error with no jam. I open the lid, then close it and it clears the paper jam error but that is when the no waste toner error pops up and stays on. Any suggestions?

Wow