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BugZero found this defect 162 days ago.
When replacing a Toner cartridge it will not sit properly or lock in place.
Remove the Toner Cartridge from the machine and locate the Toner's Shutter Lock Mechanism in incorrect position. Rotate the Toner's Shutter Lock Mechanism counterclockwise to the proper position. Re-Install the toner cartridge. If the problem persists, contact Support for additional assistance.