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Appendix A. Data collection and troubleshooting
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Table 4. TCM problem indications, solution 2
Table 5. TCM problem indications, solution 3
Table 6. TCM problem indications, solution 4
TFIO board troubleshooting
Indications of problems with TFIO boards may come from three sources:
• LEDs on the TFIO board.
• The 16-character scrolling display near the bottom of the TCM board.
• The Enterprise Manager alarm log.
Normal TFIO operation
During normal operation, the TFIO Status LEDs provide the following information:
Action Remove and reseat the board, and verify that the mounting
screws are tightened to the proper torque. If the fault
persists, try substituting another TCM.
Fault LED is lit, TCM passed hardware diagnostics
Problem Summary The TCM is non-functional.
Probable Cause Hardware failure.
Action Replace the TCM board.
TCM failure alarm at the Enterprise Manager
Problem Summary The TCM is non-functional.
Probable Cause Hardware failure.
Action Replace the TCM board.
Heartbeat LED blink interval is not normal
Problem Summary There has been a hardware failure.
Probable Cause The board may not be seated properly, or it may be faulty.
Action Remove and reseat the board. Verify that the latch
mounting screws are tightened to the proper torque. If the
fault persists, try to determine the source of the fault by
interpreting the interval pattern of the Heartbeat LED (see
TCM/TFIO/TSW PROM boot blink codes and TCM/TFIO/
TSW board boot blink codes). Error conditions on the
board are indicated by a three-second delay when the LED
is not lit, followed by a specific distinctive rapid blink interval
rate pattern. Document your findings, and then replace the
board. Place the failed board in an antistatic bag, and
return it to IBM.
Table 3. TCM problem indications, solution 1 (Continued)
Fault LED is lit, TCM failed hardware diagnostics