Lenovo IdeaCentre B500 Lenovo IdeaCentre B500 Hardware Maintenance Manual - Page 26

Beep symptoms, POST error codes

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Hardware Maintenance Manual Beep symptoms Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST. The following tables describes beep symptoms. Beep Symptom 1 beep Memory refresh timer error FRU/Action Reseat the memory, or replace with known good modules. 2 beeps Parity error in base memory (first 64KB block) 3 beeps Base memory read/write test error POST error codes Each time you power-on the system, it performs a series of tests that check the operation of the system and some options. This series of tests is called the Power-On Self-Test, or POST. POST does the following operations. • Checks some basic system-board operations • Checks the memory operation • Starts the video operation • Verifies that the boot drive is working If the POST detects a problem, an error message appears on the screen. A single problem can cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time you turn on the system. 24

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Hardware Maintenance Manual
24
Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses
(intervals without sound) during POST.
The following tables describes beep symptoms.
Beep Symptom
FRU/Action
1 beep
Memory refresh timer error
Reseat the memory, or replace with
known good modules.
2 beeps
Parity error in base memory (first
64KB block)
3 beeps
Base memory read/write test error
POST error codes
Each time you power-on the system, it performs a series of tests that
check the operation of the system and some options. This series of tests is
called the
Power-On Self-Test
, or
POST
. POST does the following operations.
•
Checks some basic system-board operations
•
Checks the memory operation
•
Starts the video operation
•
Verifies that the boot drive is working
If the POST detects a problem, an error message appears on the screen.
A single problem can cause several error messages to appear. When you
correct the cause of the first error message, the other error messages
probably will not appear on the screen the next time you turn on the
system.