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