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.
Diagnostic
code Message Description Action
W.58001 [W.58001] The PFA
Threshold limit
(correctable error
logging limit) has been
exceeded on DIMM
number % at address
%. MC5 Status
contains % and MC5
Misc contains %.
DIMM PFA Threshold
Exceeded.
Note: Each time you install or remove a DIMM,
you must disconnect the server from the power
source; then, wait 10 seconds before restarting
the server.
1. Check the IBM support website for an
applicable retain tip or firmware update that
applies to this memory error.
2. Swap the affected DIMMs (as indicated by
the error LEDs on the system board or the
event logs) to a different memory channel
(see “Installing a memory module” on page
250 for memory population sequence).
3. If the error still occurs on the same DIMM,
replace the affected DIMM (see “Removing a
memory module (DIMM)” on page 250 and
“Installing a memory module” on page 250).
4. If the problem occurs on the same DIMM
connector, swap other DIMMs (in the same
memory channel) to a different memory
channel or microprocessor (see “Installing a
memory module” on page 250 for memory
population sequence). If the problem follows
a moved DIMM to a different memory
channel, replace the affected DIMM.
5. (Trained technician only) If the problem
occurs on the same DIMM connector, check
the DIMM connector. Remove any foreign
material on the DIMM connector, if found. If
the connector is damaged, replace the
system board (see “Removing the system
board” on page 290 and “Installing the
system board” on page 292).
6. (Trained technician only) Remove the affected
microprocessor and check the microprocessor
socket pins for any damaged pins. If a
damage is found or the microprocessor is an
upgrade part, replace the system board.
7. (Trained technician only) Replace the affected
microprocessor (see “Removing a
microprocessor and heat sink” on page 279
and “Installing a microprocessor and heat
sink” on page 282).
8. (Trained technician only) Replace the system
board (see “Removing the system board” on
page 290 and “Installing the system board”
on page 292).
36 IBM System x3650 M4 Type 7915: Problem Determination and Service Guide
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