Exception: If there are multiple error codes or light path diagnostics LEDs thatindicate a microprocessor error, the error might be in the microprocessor or in themicroprocessor socket. See “Microprocessor problems” on page 48 for informationabout diagnosing microprocessor problems.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 7978 and 1913 server,” on page 89 to determine which components areCRUs and which components are FRUs.v If an action step is preceded by “(Trained service technician only),” that step must be performed only by atrained service technician.Beep code Description ActionNo beep System board failure. (Trained service technician only) Replace thesystem board.1-1-2 Microprocessor register test failed. 1. (Trained service technician only) Reseatthe microprocessors.2. (Trained service technician only) Replacethe following components one at a time, inthe order shown, restarting the server eachtime:a. Microprocessor 2 (if present).b. Microprocessor 1.1-1-3 CMOS write/read test failed. 1. Reseat the system board battery.2. Replace the following components one ata time, in the order shown, restarting theserver each time:a. System-board batteryb. (Trained service technician only)System board1-1-4 BIOS EEPROM checksum failed. 1. Reload the server BIOS (see “Recoveringthe BIOS code” on page 76).2. (Trained service technician only) Replacethe system board.1-2-1 Programmable interval timer failed. (Trained service technician only) Replace thesystem board.1-2-2 DMA initialization failed. (Trained service technician only) Replace thesystem board.1-2-3 DMA page register write/read failed. (Trained service technician only) Replace thesystem board.1-2-4 RAM refresh verification failed. 1. Reseat the DIMMs.2. Replace the following components, one ata time, in the order shown:a. DIMMsb. (Trained service technician only)System board20 IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide
