If the toner cartridge drum is not turning you would not get a piece of paper past the toner cartridge so you are not doing something right. You may have two different issues happening. First there is a registration sensor in the middle below the registration assembly which tells the printer the leading edge of the media has reached that point and starts the image making and transfer as the paper goes under the toner. If that sensor is not working, the flag broken or dirt blocking the sensor, the printer keeps feeding until it errors out for the paper taking to much time to reach that sensor. That is why you have paper coming out the back and another sheet stuck just before the fuser as the printer shut down as the second sheet was moving thru. Get yourself a can of compressed air and try blowing out the area around that sensor flag as it could be dirt or piece of media blocking the sensor. The other issue could be the laser/scanner shutter is not opening when the toner door is closed. Usually when this happens you will never get a jam or a jam message but paper will just feed thru like it is printing.
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