137 4.11.1 Multiple sheets of document are fed.137 4.11 Troubleshooting for Document Feeding Problems.136 4.10.3 Low-voltage power supply PCB failure. ![]() 136 4.10.2 High-voltage power supply PCB failure.136 4.10 Troubleshooting for PCB Problems.135 4.9 Troubleshooting for Laser Unit Problems.134 4.8 Troubleshooting for Fuser Unit Problems.133 4.7.2 Cartridge error (toner cartridge cannot be detected).133 4.7 Troubleshooting for Toner and Drum Problems.132 4.6.1 Nothing is displayed on the LCD.132 4.6 Troubleshooting for Control Panel Problems.131 4.5.1 Cannot print via network connection. ![]() 131 4.5 Troubleshooting for Network Problems.130 4.4 Troubleshooting for Software Problems.117 4.3.2 Troubleshooting according to image defect.116 4.3 Troubleshooting for Image Defects. ![]()
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