IBM 88643RU Service Guide - Page 80
codes - ram
UPC - 000435958211
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POST beep codes A beep code is a combination of short or long beeps or a series of short beeps separated by pauses. For example, a "1-2-3" beep code is one beep, a pause, two beeps, a pause, and three beeps. When POST is completed, one beep is emitted to indicate that the server is working correctly. If POST detects a problem during startup, other beep codes might occur. See "Beep code descriptions" to help diagnose and solve problems that are detected during startup. If no beep code sounds, see "No-beep symptoms" on page 69. Beep code descriptions The following table describes the beep codes and suggested actions to correct the detected 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 3, "Parts listing, Type 8864," on page 23 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. 1. Reseat the following components: a. Battery b. I/O board 2. Clear CMOS. See "I/O board internal connectors and jumpers" on page 8. 3. Replace the components listed in step 1 one at a time, in the order shown, restarting the server each time. 1-1-4 BIOS ROM checksum failed. 1. Reseat the microprocessor tray. 2. (Trained service technician only) Replace the 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. DIMM b. Memory card 2. Replace the components listed in step 1 one at a time, in the order shown, restarting the server each time. 64 IBM System x3850 Type 8864: Problem Determination and Service Guide