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
18.
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 8863,” on page 93 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.
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.
1-3-1 1st 64K RAM test 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.
14 IBM xSeries 366 Type 8863: Problem Determination and Service Guide
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