Lenovo ThinkCentre M92z Hardware Maintenance Manual - ThinkCentre M92z (type 3 - Page 68

POST error codes, Power-On Self-Test

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The following tables describes beep symptoms. Beep Symptom 2 short beeps CMOS setting error 3 short and 1 long beeps DRAM memory error FRU/Action Common error code, see the detail failure information in "POST error codes" on page 64. Perform the following actions in order. 1. Make sure the memory module(s) are properly seated in the connector(s). 2. Replace the memory module(s). 3. Replace the system board. 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. Error code 0135 0211 0164 1762 POST Error Message Fan failure Keyboard not found Memory size decreased Configuration change has occurred Description/Action The system might be overheating. Press F10 to exit. Note: If the problem is caused by the microprocessor fan, press F10 will not solve the problem. When there is no keyboard detected, the error message will be displayed. Press F10 to exit. This error message is displayed when a hard disk drive or optical drive change has been made. Press F10 to exit. 64 ThinkCentre Hardware Maintenance Manual

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The following tables describes beep symptoms.
Beep Symptom
FRU/Action
2 short beeps
CMOS setting error
Common error code, see the detail failure information in
“POST error codes” on page 64.
3 short and 1 long beeps
DRAM memory error
Perform the following actions in order.
1. Make sure the memory module(s) are properly seated
in the connector(s).
2. Replace the memory module(s).
3. Replace the system board.
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.
Error code
POST Error Message
Description/Action
0135
Fan failure
The system might be overheating.
Press F10 to exit.
Note:
If the problem is caused by the
microprocessor fan, press F10 will
not solve the problem.
0211
Keyboard not found
When there is no keyboard detected,
the error message will be displayed.
0164
Memory size decreased
Press F10 to exit.
1762
Configuration change has occurred
This error message is displayed when
a hard disk drive or optical drive
change has been made.
Press F10 to exit.
64
ThinkCentre Hardware Maintenance Manual