Oracle X7-8, Service Manual

Page: 189 / 308

Identify and Remove a Faulty DIMM
system. However, when the Fault Remind button is pressed, only the fault status indicator
(LED) associated with the failed DIMM lights. The fault LEDs for the other DIMMs in the
memory channel remain off. Therefore, you can correctly identify the failed DIMM using the lit
LED.
Identify and Remove a Faulty DIMM
1. Use Oracle ILOM to identify the location of the failed DIMM and obtain CMOD
designation information.
See “Troubleshooting Server Hardware Faults” on page 48 .
2. Prepare the server for service. Choose one of the following methods:
■
Prepare the server for warm service.
■
Prepare the server for cold service.
See “Preparing the Server for Component Replacement” on page 101 .
3. Remove the CMOD that contains the failed DIMM. See “Remove a
CMOD” on page 162 .
4. Remove the CMOD top cover. See “Remove the CMOD Cover” on page 164 .
To remove the CMOD top cover, push the release button, slide the CMOD cover toward the
back of the CMOD, and lift it away.
5. Identify and note the location of the faulty DDR4 DIMM by pressing the Fault
Remind button on the motherboard.
Faulty DIMMs are identified with a corresponding amber LED on the motherboard.
■
If the DIMM Fault LED is off, then the DIMM is operating properly.
■
If the DIMM Fault LED is on (amber), then the DIMM is faulty and should be replaced [1].
To locate the failed DIMM, press and hold the Fault Remind button [2].
Servicing Components 189