IBM System x3650 M4 Type 7915 Problem Determination And Service Manual page 173

Table 9. DSA Preboot messages (continued)
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
v If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained technician.
v Go to the IBM support website at http://www.ibm.com/supportportal/ to check for technical information, hints, tips, and
new device drivers or to submit a request for information.
Message
number Component
166-904-xxx IMM
Test State Description Action
IMM I2C Test Failed The IMM
indicates a
failure in
the
PCA9543
bus (Bus
3)
1. Turn off the system and disconnect it from the power
source. You must disconnect the system from ac
power to reset the IMM.
2. After 45 seconds, reconnect the system to the power
source and turn on the system.
3. Run the test again.
4. Make sure that the DSA code is at the latest level. For
the latest level of DSA code, go to
http://www.ibm.com/support/
docview.wss?uid=psg1SERV-DSA.
5. Make sure that the IMM firmware is at the latest level.
The installed firmware level is shown in the DSA event
log in the Firmware/VPD section for this component.
For more information, see "Updating the firmware" on
page 297.
6. Run the test again.
7. Turn off the system and disconnect it from the power
source.
8. (Trained technician only) Reseat the system board.
9. Reconnect the system to the power source and turn on
the system.
10. Run the test again.
11. If the failure remains, go to the IBM website for more
troubleshooting information at http://www.ibm.com/
systems/support/supportsite.wss/
docdisplay?brandind=5000008&lndocid=SERV-CALL.
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Chapter 3. Diagnostics