IBM x3655 Service Guide - Page 126

Beep code descriptions The following table describes the beep codes and suggested actions to correct the detected problems. A single problem might cause more than one error message. When this occurs, correct the cause of the first error message. The other error messages usually will not occur the next time POST runs. Exception: If there are multiple error codes or light path diagnostics LEDs that indicate a microprocessor error, the error might be in a microprocessor or in a microprocessor socket. See "Microprocessor problems" on page 131 for information about diagnosing microprocessor problems. v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 4, "Parts listing, System x3655, Type 7985," on page 97 to determine which components are customer replaceable 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 a trained service technician. Beep code Description Action 1-1-3 CMOS write/read test failed. (Trained service technician only) Replace the system board. 1-1-4 BIOS ROM checksum failed. 1. Restart the server using the backup BIOS page (see "Recovering the BIOS code" on page 156). 2. Update the BIOS code. 3. (Trained service technician only) Replace the system board. 1-2-1 Programmable interval timer failed. (Trained service technician only) Replace the system board. 1-2-2 DMA initialization failed. (Trained service technician only) Replace the system board. 1-2-3 DMA page register write/read failed. (Trained service technician only) Replace the system board. 1-2-4 RAM refresh verification failed. 1. Reseat the DIMMs. 2. Replace the following components one at a time, in the order shown, restarting the server each time. a. DIMMs b. (Trained service technician only) System board 108 IBM System x3655 Type 7985: Problem Determination and Service Guide