"Slide the Green tab on each of the 4 color units. See manual ..."
I have followed instructions and air blown the 4 drum holders and corona wire
The 3 color drums were replaced recently
Menu: Machine Info/Parts Info/Drum says 26% left
Model: MFC 9440-cn
Have followed instructions on LCD and found in online help blogs
OK. I will opt out so any other expert can try to help you. You will receive an email when another expert takes your question. The new expert will see all our previous thread, so no need to explain the issue again.
That's weird. Have you tried sliding the green tabs already? Also, please unplug the printer from the electric outlet, then remove all the cartridges, wait 10 minutes, turn it on, then insert the cartridges again.
Does it work?