Ok here’s the situation. It plays out over and over again, more so in our Education institutions. Yes the people that teach our children.
The Teacher / Instructor/ Professor approaches the copier with the Test or Assignment that they have to administer to their class within the next 2 minutes. They insert their originals and dial up 30 sets. Half way through the job the copier stops and asks them to replace the toner. Here’s were the dance begins. They think gee I only need 10 more sets! So instead of replacing the toner they: Open and close the toner door, yank out the toner cartridge shake it and slam it back in ( maybe several times ), then if all else fails they cycle the main power several times. Finally they get the remaining 10 sets and leave the copier for the next non suspecting person.
The whole cycle repeats itself with the next user. This may continue for a day or two until the machine gives up and pops a service code. This is where we come in and have to deal with depleted developer or contaminated toner bottle sensors . And then to add insult to injury there’s the stupid question from the customer. “Didn’t you bring any Toner with you?”