To replace the toner on a laser printer, follow these steps:

1. Switch off the printer and unplug the power cord.
2. Open the access door or hood in the front or on top of the printer.
3. Gently shake the toner cartridge from side to side several times, and then remove it from the printer.
4. Unpack the new toner cartridge and shake it five or six times in the same direction.
5. Place the new toner cartridge within the printer and push down until it clicks into place.
6. Close the access door or hood, and then plug in the power cord.
7. Turn on the printer and it should be ready for use