Message says to add toner after I replace toner

1. Open front door and pull out toner hopper.
2. Remove toner and make sure it still hase the clear cap on the top fully inserted in the bottle. If cap is missing and you can see the toner in bottle, it's a lost cause get a new toner bottle.
3. Lay toner bottle in hopper and push toner hopper in the machine while keeping the green latch up all the way through the pushing motion. This is critical to ensure the cap will come off. Once toner hopper is pushed all the way in, push the green lever down. Again it is mportant to mention that the gree lever must be up till the toner hopper is ushed in all the way. Then and only then the green lever may be pushed down.
4. Allow machine to load toner.
5. If it still says add toner, open and close front door. Again allow machine to load toner. You may have to do this up to five times (open and close front door) to replenish the deleoper unit with toner.
This problem is common with these machines if you do several copies of a dark original or print. The developer gets depleted of toner, it just cant keep up and then the machine says add toner.

Plunger from the top of the previous bottle is probably still stuck in the machine. Remove the toner bottle and check/remove .

Alot of times when the PCU has reached it's life, it will continually say add toner. You might be able to do a bandaid repair by good cleaning, but I think the answer is to replace the pcu. Another idea, if you cheat the front door with folded paper or whatever, you should be able to watch the toner bottle. Is it turning? The toner motors can go bad where they don't come on therefore not adding any toner. Good luck. Please rate this. Thanks.

Hi there,
I have a Tally Genecom 8124 Printer and it says add toner M, So i have refilled it and it still says add toner M.
I only refill because Tally Genecom has gone bust so you cant get the toners anymore.
If any one can help please..?
Thank you
Dave