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error Brother
Error Code Cover is Open
The machine cover is open, preventing normal operation.
? What Causes This
Cover was not properly closed after accessing the machine interior.
✓ How to Fix It
- Close the machine cover completely.
- Follow the messages displayed on the LCD.
- If the error persists, refer to the Online User's Guide or FAQs & Troubleshooting page at support.brother.com
Source: page 13 of the official manual
From the manual
This error code appears in:
Brother DCP-B7500D Monochrome Laser Multifunction Printer