SOURCE: Brother MFC 7420 Paper Jam
After changing the drum, toner and running around town for days trying to find a reliable place to get this printer repaired, I realized I was spending a lot more money than what the printer actually costs. the drum was over $100, toner was $80, and the printer is $250. I bought a new one, and I can now use the old one for parts.
SOURCE: Paper Jam Error on HP 2015
For whatever reason the printer internal programming became corrupt showing that there is a paper jam. After checking the paper path and a quick can of air sprayed into the tracks, I proceeded to attempt a Cold Reset.
1) Remove the paper tray.
2) Remove toner cartridge.
3) Unplug USB.
3) While plugged in to power, turn off the printer, hold down the 'GO' button and power it back on. Continue to hold for more than 5 seconds but less than 15.
4) Reinstall the tray (be sure to check the paper level indicator is operating when you add paper to the tray. The lever should move up as it fills with paper)
Reconnect the USB cable (make sure you are using a thick USB cable and not a cheap thin one, very important. Make sure the printer is not plugged into a backup batter either) Never plug a printer into backup power.
I noticed that the computer did not recognize the device when connected which prompted me to contact HP support.
HP Support is shipping out Item # CE517AB - Font/DIMM Program for me to install in the printer to most likely reinstall the firmware.
I will post back if this works to flash the firmware or just waste some time.
SOURCE: Samsung ML 1510 LAser Printer
check the spring if it push the roller well or it's weak also check ur paper if its high quality to be rolled
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