Lenovo IdeaCentre B520e - Manual (Page 23)

Chapter 6. Symptom-to-FRU Index
The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first.
Always begin with Chapter 4, “General Checkout,” on page 13. This index can also be used to help you
decide which FRUs to have available when servicing a computer.
Notes:
• If you have both an error message and an incorrect audio response diagnose the error message first.
• If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did
receive a POST error message diagnose the POST error message first.
• If you did not receive any error message look for a description of your error symptoms in the first part of
this index.
Hard disk drive boot error
A hard disk drive boot error (error codes 1962) can have the following cause.
Error FRU/Action
No operating system found. Press any key to repeat boot
sequence. Install an operating system on the boot drive.
Power Supply Problems
If you suspect a power problem, use the following procedures.
Check/Verify FRU/Action
Check the following for proper installation.
• Power adapter connector
• System Board Power adapter connectors
• Microprocessor(s) connection
Reseat connectors
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
4 beeps System can not connect Memory or Memory is
broken. Reseat the memory, or replace with known good modules.
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
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