3-92 Phaser 7700 Color Laser PrinterTroubleshooting when the Printer does not come to a“Ready” statePrinter does nothing when power switched onRefer to Troubleshooting AC Power on page 3-87Fans on, Front Panel LED never on Check the Image Processor Board DIP Switches see DIP Switches onpage 35. Refer to Troubleshooting the Low-voltage Power Supplies onpage 88. Replace the Front Panel Cable (RRP 4, on page 7-143). Replace the Front Panel (RRP 4, on page 7-143). Replace the Internal Hard Drive (RRP 40, on page 7-187). Replace the Image Processor Board (RRP 39, on page 7-186).Fans on, Front Panel LED is red, no Front Panel message Replace the Front Panel Cable (RRP 4, on page 7-143). Replace the Front Panel (RRP 4, on page 7-143). Replace the Internal Hard Drive (RRP 40, on page 7-187). Replace the Image Processor Board (RRP 39, on page 7-186).Front Panel continually displays the Xerox Phaser 7700 splash screen Enter Service Diagnostics Mode. Refer to Entering ServiceDiagnostics Mode: on page 3-35 Watch the Front Panel during the "initializing" period for messagesindicating any printer faults. View the Fault List for indications of any printer faults. Replace the Engine Control Board (RRP 42, on page 7-190). Replace the Engine Control Interface Board (RRP 43, on page 7-191). Replace the Hard Disk (RRP 40, on page 7-187). Replace the Image Processor Board (RRP 39, on page 7-186).Front Panel continually displays " WARMING UP - PLEASE WAIT" messageSee the procedure for "Error 86 High-voltage Power Supply Failure” onpage 3-71.Front Panel displays "Fatal Fault Encountered" messageSee procedure for "Error 81 Controller to Engine Communications Failure” onpage 3-71.
