Lexmark W812 User's Reference - Page 42
Solving printing problems
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15 Solving printing problems Symptom The operator panel display is blank or displays only diamonds. Jobs do not print. Cause The printer self test failed. The printer is not ready to receive data. The output bin is full. The specified tray is empty. Solution Turn the printer off, wait about 10 seconds, and turn the printer back on. Performing Self Test appears on the display. When the test is completed, the Ready message is displayed. If the messages do not appear, turn the printer off and call for service. Make sure Ready or Power Saver appears on the display before sending a job to print. Press Go to return the printer to the Ready state. Remove the stack of paper from the output bin, and then press Go. Load paper in the tray. See Loading the trays for detailed instructions. 42
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