Diagnostic Error Code
FRU/Action
305-000-XXX
Monitor DDC Test Passed
No action
305-250-XXX
Monitor DDC self test failure
1. Run Setup to enable DDC
2. Cable
3. Monitor
4. Video card
5. System board
415-000-XXX
Modem Test Passed
No action
415-XXX-XXX
Modem error
Remove the Modem and re-test the system
Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during the POST.
The following tables describes beep symptoms.
Beep Symptom
FRU/Action
3 short beeps and 1 long beep
Memory not detected
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.
2 short beeps
Common POST Error
Indicates that an error has occurred during the POST.
POST error codes
Each time you Turn 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
. The 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.
POST Error code
POST Error message
Description/Action
00CE
Machine Type or Serial Number is INVALID
This error message is displayed when the machine
type or the serial number is invalid.
0210
Stuck key
This error message is displayed during the POST
when a key is kept pressed for a long time.
Chapter 7
.
Symptom-to-FRU index
65
Summary of Contents for ThinkCentre M76
Page 6: ...2 ThinkCentre Hardware Maintenance Manual ...
Page 13: ...Chapter 2 Safety information 9 ...
Page 14: ... 18 kg 37 lb 32 kg 70 5 lb 55 kg 121 2 lb 10 ThinkCentre Hardware Maintenance Manual ...
Page 18: ...14 ThinkCentre Hardware Maintenance Manual ...
Page 19: ...1 2 Chapter 2 Safety information 15 ...
Page 20: ...1 2 16 ThinkCentre Hardware Maintenance Manual ...
Page 26: ...22 ThinkCentre Hardware Maintenance Manual ...
Page 27: ...1 2 Chapter 2 Safety information 23 ...
Page 31: ...Chapter 2 Safety information 27 ...
Page 32: ...1 2 28 ThinkCentre Hardware Maintenance Manual ...
Page 36: ...32 ThinkCentre Hardware Maintenance Manual ...
Page 40: ...36 ThinkCentre Hardware Maintenance Manual ...
Page 74: ...70 ThinkCentre Hardware Maintenance Manual ...
Page 116: ...112 ThinkCentre Hardware Maintenance Manual ...
Page 208: ...204 ThinkCentre Hardware Maintenance Manual ...
Page 213: ......
Page 214: ...Part Number 0A94225 Printed in USA 1P P N 0A94225 0A94225 ...