Determine Which Dimm Is Faulty - Oracle SPARC T5-1B Service Manual

Determine Which DIMM Is Faulty

This procedure describes how to use the DIMM LEDs on the motherboard to pinpoint the
physical location of a faulty DIMM.
You can also obtain the location of the faulty DIMM using the fmadm faulty command.
Note -
This command displays the FRU name. See
Names" on page
Components inside the chassis might be hot. Use caution when servicing components
Caution -
inside the chassis.
1. Check the front panel Fault LED.
See "Interpreting LEDs" on page
When a faulty DIMM is detected, the front panel Fault LED is illuminated. Before opening the
server module to check the DIMM Fault LEDs, verify that the Fault LED is lit.
If the Fault LED is not lit, and you suspect there is a problem, see
■
Process" on page
If the Fault LED is lit, go to the next step.
■
2. (If needed) Prepare for service.
See "Preparing for Service" on page
3. Press the Fault Remind button on the motherboard.
While the Remind button is pressed, an LED next to the faulty DIMM lights, enabling you to
identify the faulty DIMM. See
Tip - The DIMM Fault LEDs are small and difficult to identify when they are not lit. If you do
not see any illuminated LEDs in the area of the DIMM LEDs, use the fmadm faulty command
and the DIMM layout table to locate the faulty DIMM.
Remove the faulty DIMM.
4.
See "Remove a DIMM" on page
Related Information
"DIMM FRU Names" on page 64
■
64.
23.
18.
39.
"DIMM LEDs" on page
68.
Determine Which DIMM Is Faulty
"Managing Faults" on page 32
66.
and "DIMM FRU
"Diagnostics
Servicing DIMMs 67