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Symptom-To-Fru Index; Beep Symptoms - IBM 21Y Maintenance Manual

Type 8657
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Symptom-to-FRU index

This index supports Netfinity 3500-M20 – Type 8657 serv-
ers.
Notes:
1. Check the configuration before you replace a FRU.
Configuration problems can cause false errors and
symptoms.
2. The default configuration can be loaded by starting the
system and then pressing the reset button four times,
waiting 15 seconds between each press. Once the
configuration has reset to the default, it must be saved
in Setup to be stored in CMOS.
3. For IBM devices not supported by index, refer to the
manual for that device.
4. Always start with "General checkout" on page 1.
The Symptom-to-FRU lists symptoms, errors, and the possi-
ble causes. The most likely cause is listed first. Use this
Symptom-to-FRU index to help you decide which FRUs to
have available when servicing the computer. The POST
BIOS displays POST error codes and messages on the
screen.

Beep symptoms

Beep symptoms are short tones or a series of short tones
separated by pauses (intervals without sound). See the fol-
lowing examples.
Note: One beep after successfully completing POST indi-
cates the system is functioning properly.
Beeps
1-2-3
4
Beep/Symptom
1-1-3
(CMOS
write/read test
failed)
1-1-4
(BIOS EEPROM
checksum failed)
• One beep
• A pause (or break)
• Two beeps
• A pause (or break)
• Three Beeps
Four continuous beeps
1. Battery
2. System Board
1. System Board
Description
FRU/Action
129

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