Brother MFC-8460N Toner and Drum Reset Trick

Open door press Clear/Back key
press *00
press OK
Do not choose anything for drum replacement.
When drum replacement menu comes up, press the * and then 00, then press OK.

To reset the "Drum near end" warning
Open door
Press clear
then press 1

The Brother MFC-8460N uses the DR520 Drum cartridge and the TN550 standard yield or TN580 high yield toner cartridge.