Hi Seng, Run a self test from the printers control panel. 1. Press the printer?s ON LINE button to take the printer offline. 2. Press the Control Panel MENU button until TEST MENU appears on the display. 3. Press ITEM until SELF TEST appears on the display. 4. Press ENTER. The Self-Test will print. 5. Press ON LINE to return the printer to the online state. If it prints than you have a software issue if not it's hardware. For Software Check the Density Settings. Make sure it's not set too light. Also try printing from another app, maybe you have a corrupt print job. If you have a hardware issue come back here and I'll help you sort through those. Let me know, Dude
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