Table 6-2. Control Panel LED Status Messages C4170-90959 Troubleshooting with Control Panel Messages 95 Control Panel LED Pattern Error message Recommended Action Start-up. The Go, Ready, and Attention LEDs cycle one after another.The buttons have no effect until the printer is ready. No action is needed. Ready. The Ready LED is on and the printer is ready to print. Pressing the GO Button will print a demo page. No action is needed. Processing.The printer is receiving or processing data. Pressing JOB CANCEL cancels the current job. One or two pages may print as the printer clears the print job. The printer will return to the ready state after the job has been canceled. No action is needed.