v Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 3, “Parts listing, Type 8863,” on page 105 to determine which components are customerreplaceable units (CRU) and which components are field replaceable units (FRU).v If an action step is preceded by “(Trained service technician only)”, that step must be performed only by atrained service technician.Error code Description Action166-201-001 ISMP indicates I2C errors on bus P. 1. Reseat the following components:a. (Trained service technician only) Powerbackplaneb. I/O boardc. Microprocessor tray2. Replace the following components one at a time,in the order shown, restarting the server eachtime.a. (Trained service technician only) Powerbackplaneb. I/O boardc. (Trained service technician only)Microprocessor tray166-201-002 ISMP indicates I2C errors on bus I. Reseat and, if necessary, replace the I/O board.166-201-003 ISMP indicates I2C errors on bus C. 1. Reseat the following components:a. Microprocessor trayb. I/O board2. Replace the following components one at a time,in the order shown, restarting the server eachtime.a. (Trained service technician only)Microprocessor trayb. I/O board166-201-004 ISMP indicates I2C errors on bus M. 1. Reseat the following components:a. I/O boardb. Memory cardc. Microprocessor tray2. Replace the following components one at a time,in the order shown, restarting the server eachtime.a. I/O boardb. Memory cardc. (Trained service technician only)Microprocessor tray166-201-005 ISMP indicates I2C errors on bus S. 1. Reseat the following components:a. SAS hard disk drive backplane cablesb. I/O board2. Replace the following components one at a time,in the order shown, restarting the server eachtime.a. SAS hard disk drive backplaneb. I/O boardChapter 2. Diagnostics 81