Lenovo ThinkServer TD200x Hardware Maintenance Manual page 110

Table 4. DSA messages (continued)
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 8 "Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823" on page 221 to determine
which components are customer replaceable units (CRU) and which components are field replaceable
units (FRU).
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by
a Trained service technician.
Message
number Component Test
166-905-xxx IMM
102
ThinkServer TD200x Hardware Maintenance Manual
State Description
Failed The IMM
IMM I2C
Test indicates
a failure in
the SAS
backplane
and the
Sensor bus
(Bus 4)
Action
Note: Ignore the error if the hard disk drive
backplane is not installed.
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.
5. Make sure that the IMM firmware is at the
latest level. The installed firmware level is
shown in the DSA log in the Firmware/VPD
section for this component. For more
information, see Updating the firmware.
6. Run the test again.
7. Turn off the system and disconnect it from
the power source.
8. Reseat the hard disk drive backplane.
9. Reconnect the system to the power source
and turn on the system.
10. Run the test again.
11. Turn off the system and disconnect it from
the power source.
12. Trained service technician only) Replace the
system board.
13. Reconnect the system to the power source
and turn on the system.
14. Run the test again.
15. If the failure remains, go to the Lenovo Web
site for more troubleshooting information at
http://www.lenovo.com/support.