Lexmark X940E - Safety Information; General Safety Precautions; Electrical Safety and Connections; Laser Safety Advisory

3 Pull the tape from each cartridge.
4 Insert the black toner cartridge into the printer.
Warning: Make sure the toner cartridge is fully inserted before completing step 5.
5 Turn the knob on the cartridge clockwise to lock the cartridge into place.
6 Insert the remaining three cartridges. Make sure they are fully inserted, and then turn the knob to lock each of
them into place.
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