Chapter 7. Symptom-To-Fru Index; Hard Disk Drive Boot Error; Power Supply Problems - Lenovo ThinkCentre M90 Hardware Maintenance Manual
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Chapter 7. 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 the Chapter 4 "General checkout" on page 33. You can use this index to help you decide
which FRUs are needed when servicing a computer. If you are unable to correct the problem using this
index, go to "Undetermined problems" on page 64.
Notes:
1. If you have both an error message and an incorrect audio response, diagnose the error message first.
2. 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.
3. If you did not receive any error message, look for a description of your error symptoms in the first part of this index.
4. For computer models that do not have an internal hard disk drive and use a remote hard disk drive accessed
through the SMC - Storage Array:
• You might receive the error message "No operating system found. Press F1 to repeat boot sequence." In this
case, press Ctrl+Alt+Delete instead of F1 to establish a connection to the storage area network where your
operating system is stored. Verify that the user name is not logged on in another location.
• If the SMC login prompt disappears before you log in and then a black screen displays, contact the
administrator.
Hard disk drive boot error
A hard disk drive boot error (error codes 1962 and I999030X) can have the following causes.
Note: For computer models that do not have an internal hard disk drive and use a remote hard disk drive
accessed through the SMC - Storage Array, contact the network or storage administrator.
Error
The start-up drive is not in the boot sequence in
configuration.
No operating system installed on the boot drive.
The boot sector on the start-up drive is corrupted.
The drive is defective.
Power Supply Problems
If you suspect a power problem, use the following procedures.
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FRU/Action
Check the configuration and ensure the start-up drive is
in the boot sequence.
Install an operating system on the boot drive.
The drive must be formatted. Do the following:
1. Attempt to back-up the data on the failing hard disk
drive.
2. Using the operating system programs, format the
hard disk drive.
Replace the hard disk drive.
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