The 7410 indicates a drum error (see below) the 0163053 is the number of prints made by the printer. The drum was most likely knocked loose when installing toner.
Drum unit non- installing error -
The drum unit is not installed or not installed properly.
Detaching and refitting the developer unit Procedure
1. Open the top cover.
2. Open the MP tray.
3. Remove the developer unit.
4. Check or replace the developer unit and refit all the removed parts.
Detaching and refitting the drum unit
1. Remove the developer unit.
2. Open the left side cover and then remove the waste toner box.
3. Unlock the drum unit lock and then remove the drum unit.
4. Check or replace the drum unit and refit all the removed parts.
I hope this is helpful,
Shawn
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