Error Messages and Codes 3-3Power-Up Error Messages and LED CodesThe system has three sets of tests that are run when first powered on:■ Built-In Self Tests (BIST)■ Power On Self Tests (POST)■ Print Engine Self Tests (PEST)NoteBIST and POST errors are not stored in the fault history logs.BIST Error ReportingBIST verifies basic electronics module CPU operation and reports failures byutilizing the rear interface panel PS and PE LEDs. These tests occur immediately atpower-up, before POST tests are run or the control panel is initialized.The following table defines the blink patterns associated with a failure.BIST Error Reporting Blink Pattern Definition TablePE LED PS LED DescriptionOff or 1Blink, andthen offOff or 1Blink, andthen offThe power supply could not remain regulated when DC powerwas applied so it was shut down.Follow the troubleshooting procedures for electrical shorts (see"Electrical Troubleshooting" on page 4-58 and check the powersupply fuses).On Solid(dimly)On Solid(dimly)Initialization failure. The system is held in reset mode. This canbe caused by an electronics module fault or a +3.3 V powersupply regulation failure (see "Electrical Troubleshooting" onpage 4-58). Also, see "Verifying Power Supply Operation - PrintEngine" on page 4-71.Off PS andcontrolpanel 1/2sec. blinkBoot loader memory test failure. Ensure the systems RAM chipsare properly seated and that the correct RAM type for thissystem is installed. For specifications on approved RAM typesfor this system, see "System Specifications" on page 1-12.1 RapidblinkingCPU bridge and/or PCI bus is not communicating. Reboot theprinter, if the error still occurs, replace the electronics module.2 RapidblinkingROM not responding. Reboot the printer, if the error still occurs,replace the electronics module.
