POST beep codesA beep code is a combination of short or long beeps or series of short beeps thatare separated by pauses. For example, a “1-2-3” beep code is one short beep, apause, two short beeps, a pause, and three short beeps. A beep code other thanone beep indicates that POST has detected a problem. To determine the meaningof a beep code, see “Beep code descriptions.” If no beep code sounds, see“No-beep symptoms” on page 18.Beep code descriptionsThe following table describes the beep codes and suggested actions to correct thedetected 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 willnot occur the next time POST runs.Exception: If there are multiple error codes or light path diagnostics LEDs thatindicate a microprocessor error, the error might be in a microprocessor or in amicroprocessor socket. See “Microprocessor problems” on page 43 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, System x3800 Type 8866,” on page 107 to determine which components arecustomer 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 atrained service technician.Beep code Description Action1-1-3 CMOS write/read test failed. 1. Reseat the following components:a. Batteryb. I/O board2. Replace the components listed in step 1one at a time, in the order shown, restartingthe server each time.1-1-4 BIOS ROM checksum failed. 1. Reseat the microprocessor tray.2. (Trained service technician only) Replacethe microprocessor tray.1-2-1 Programmable interval timer failed. 1. Reseat the I/O board.2. Replace the I/O board.1-2-2 DMA initialization failed. 1. Reseat the I/O board.2. Replace the I/O board.1-2-3 DMA page register write/read failed. 1. Reseat the I/O board.2. Replace the I/O board.1-2-4 RAM refresh verification failed. 1. Reseat the following components:a. DIMMb. Memory card2. Replace the components listed in step 1one at a time, in the order shown, restartingthe server each time.14 IBM System x3800 Type 8866: Problem Determination and Service Guide
