You need a number 2 Phillips screwdriver to remove the system board access cover.
1
Loosen the eight screws on the system board access cover. Do not remove the screws completely.
Warning:
2
Slide the cover up and away from the printer.
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Installing and removing options
Screws
The system board access cover must be replaced before operating the printer.
Removing the system board access cover
Screws
27