NPS/IPS Extension Operations Guide 4-14 Problem solvingThis chapter describes how to solve some specific problems thatmay occur when you are switching from one mode to another.Mode switching problemsUse the following information if you experience problems whenswitching print modes.Table 4-1 Mode switching problemsInformation to have when calling for serviceIn the United States, if you are unable to correct the problem, callthe following number:1-800-822-2979For customers outside the United States, call your local servicerepresentative. A model-specific phone number is attached toyour printer at installation time.Before you call, make note of the following:• Status code numbers and messages that appear on thecontroller screen and the printer console• Indicator lights that are litCondition Possible causes Corrective actionsDoes not bootfrom EPS toNPS/IPS printmode.External rigid diskdrive is not poweredON (LED on the rightfront of the externaldisk drive is notilluminated).SCSI cable betweenexternal rigid diskdrive and processoris not properlyconnected.Ensure that the drive isplugged into the powerstrip at the rear of thecontroller stand.Ensure that the SCSIcable is connected tothe single-ended SCSIconnector on the rearof the processor unit.