– What, when, where, single, or multiple systems?– Is the failure repeatable?– Has this configuration ever worked?– If it has been working, what changes were made prior to its failing?– Is this the original reported failure?• Diagnostics version– Type and version level• Hardware configuration– Print (print screen) configuration currently in use– BIOS level• Operating system software– Type and version levelNotes: To eliminate confusion, identical systems are considered identical only if they:1. Are the exact machine type and models2. Have the same BIOS level3. Have the same adapters/attachments in the same locations4. Have the same address jumpers/terminators/cabling5. Have the same software versions and levels6. Have the same Diagnostic Diskettes (version)7. Have the same configuration options set in the system8. Have the same setup for the operating system control filesComparing the configuration and software set-up between “working and non-working” systems will oftenlead to problem resolution.Symptom-to-FRU indexThe Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first.Always begin with “Service checkout” on page 95. This index can also be used to help you decide whichFRUs to have available when servicing a computer. If you are unable to correct the problem using this index,go to “Undetermined problems” on page 101.Notes:• The Symptom-to-FRU index is not specific to any machine type and are applicable to all ThinkStation computers.• 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 aPOST 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 errorA hard disk drive boot error can have the following causes.96 P720 Hardware Maintenance Manual
