Canon imageCLASS MF264dw II Multifunction Monochrome Laser Printer - Manual (Page 543)

If the feeder is not closed completely, you cannot raise the control panel. If you try to raise it by force, the
machine may be damaged.
2
Open the toner cover.
3
Gently remove the toner cartridge.
Do not shake or tilt the toner cartridge. Also, make sure to avoid applying shocks to the toner cartridge, such
as by hitting it against something. Doing so may cause the toner left in the toner cartridge to leak.
4
Remove the toner cartridge from the packing material.
Maintenance
534