Table 15 (Page 2 of 4). Light path diagnosticsSystem ErrorLED (operatorinformationpanel)Lit LED ondiagnostic LEDpanel Cause ActionOn (continued) PCI BUS A An error occurred on PCI bus A. Anadapter in PCI slot 1 or 2 or the systemboard caused the error.1. Check the error log for additionalinformation. If the error logindicates a problem with theintegrated Ethernet controller, haveyour system serviced.2. If you cannot isolate the failingadapter from the information in theerror log, try to determine thefailing adapter by removing oneadapter at a time from PCI bus A(PCI slot 1 and 2) and restartingthe server after each adapter isremoved.If the problem persists, have thesystem serviced.PCI BUS B An error occurred on PCI bus B. Anadapter in PCI slot 3, 4, or 5, or thesystem board caused the error.1. Check the error log for additionalinformation. If the error logindicates a problem with theintegrated SCSI controller, have thesystem serviced.2. If you cannot correct the problemfrom the information in the errorlog, try to determine the failingadapter by removing one adapterat a time from PCI bus B (PCI slots3–5) and restarting the server aftereach adapter is removed.If the problem persists, have thesystem serviced.HDD A hot-swap hard disk drive has failedon bus 1.1. Check the error log for additionalinformation. If the error logindicates a temperature problemand the fans are working correctly,have the system serviced.2. If the amber Hard Disk Status LEDon one of the hot-swap hard diskdrives is on, and you have anoptional RAID adapter installed,refer to the documentation providedwith the adapter for moreinformation.NMI A nonmaskable interrupt occurred. 1. If the PCI BUS A or PCI BUS BLED is on, follow the instructionsfor those LEDs.2. If the PCI BUS A or PCI BUS BLED is not on, restart the server.If the problem persists, have thesystem serviced.Chapter 6. Solving problems 155
