How do I print a test page on the HL-2030/2040/2070N?
Press the Go button to print a test page. Before doing so, make sure the printer power switch is on and the Ready LED has stopped blinking and stays green, indicating the printer has finished warming up. Check that the test page has printed correctly after it comes out. (Page 8)
From the official Brother HL-2000 Monochrome Laser Printer manual, page 8
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