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 See Chapter 4, “Parts listing, System x3550 M3 Types 4254 and 7944,” on page 159 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by “(Trained service technician only),” that step must be performed only by a Trained
service technician.
v Go to the IBM support Web site at http://www.ibm.com/systems/support/ to check for technical information, hints, tips,
and new device drivers or to submit a request for information.
Message
number Component Test State Description Action
201-901-xxx Memory Memory Test Failed Test failure:
single-bit error,
failing DIMM z.
1. Turn off the system and disconnect it from the
power source.
2. Reseat DIMM z.
3. Reconnect the system to power and turn on the
system.
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 server 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 255.
6. Run the test again.
7. Replace the failing DIMMs.
8. Re-enable all memory in the Setup utility (see
“Using the Setup utility” on page 259).
9. Run the test again.
10. Replace the failing DIMM.
11. Re-enable all memory in the Setup utility (see
“Using the Setup utility” on page 259).
12. Run the test again.
13. If the failure remains, go to the IBM Web site for
more troubleshooting information at
http://www.ibm.com/systems/support/
supportsite.wss/docdisplay?brandind=5000008
&lndocid=SERV-CALL.
142 IBM System x3550 M3 Types 4254 and 7944: Problem Determination and Service Guide