Clearing A Chassis Or Boat Fault; Main I2C Bus; Causes; Clearing A Power Supply Fault - Sun Microsystems SPARC Enterprise T5120 Installation And Service Manual

3. If thermal and electrical readings are present for the power supply, there is no
fault.
4. If thermal and electrical readings are not present for the power supply, swap
PS0 and PS1.
5. If the problem follows the power supply, replace the power supply.
6. If the problem remains with the slot, replace the I/O Box chassis.
D.6.1.3

Clearing a Chassis or Boat Fault

If the message identifies IOX@nnnn, IOB0, or 10B1, perform the following steps:
1. Move the boat(s) to the alternate boat bay(s).
2. If the problem follows the boat, replace the boat.
3. If the problem remains with slot, replace the chassis.
D.6.2

Main I2C Bus

The main I2C bus connects to all FRUs in the I/O Box chassis. A problem with any
FRU could corrupt the I2C bus and cause problems to be reported for any FRU in the
chassis. These devices are not polled, but are accessed for interrupt processing,
sensor queries, and FRUID queries or updates.
D.6.2.1

Causes

Temporary SEEPROM fault in PS0 or PS1.
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Link card is not fully seated in the boat.
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Failed I/O Box chassis, power supply, boat, or link card.
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D.6.2.2

Clearing a Power Supply Fault

If a power supply SEEPROM is identified, as in the following error, do the following
steps:
Ext sensor /SYS/IOX@nnnn/PSn SEEPROM I2C no device response. Fault not
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isolated.
1. Remove the power supply from the slot for five seconds.
2. Reinsert the power supply.
Appendix D Troubleshooting with ILOM Diagnostic Messages D-11