Lenovo RD540 manual Memory module problems

Symptom		Action
		backplane without bowing or causing movement of
		the backplane.
	6.	Ensure that the cable connection is correct. See
		“Mini-SAS to mini-SAS signal cable connections” on
		page 37.
	7.	Reconnect the backplane power cable and repeat
		step 1 through step 4.
	8.	Reconnect the backplane signal cable and repeat
		step 1 through step 4.
	9.	If you suspect a problem with the backplane signal
		cable or the backplane:
		a. Replace the affected backplane signal cable.
		b. Replace the affected backplane.
Multiple hard disk drives fail.	1. Ensure that the cable connection is correct. See
		“Mini-SAS to mini-SAS signal cable connections” on
		page 37.
	2.	Reconnect the power cables.
	3.	Reconnect the signal cables.
	4.	Replace the affected signal cables.
	5.	If you suspect a problem with the backplane, replace
		the affected backplane.

Memory module problems

Follow the suggested actions for the corresponding symptom in the order in which they are listed until the problem is solved. If none of these actions solve the problem, see “Troubleshooting procedure” on page 159 for the subsequent steps you should check after using the information in this topic. If the problem still cannot be solved, seek technical assistance. See Chapter 8 “Getting information, help, and service” on page 165.

Notes:

•If you are instructed to remove, install, or replace any CRUs, refer to the related procedure in Chapter 6 “Installing, removing, or replacing hardware” on page 67.

•If an action step is preceded by “(Trained service technician only),” this action step is reserved for a trained service technician and must be performed only by a trained service technician.

Symptom	Action
The amount of system memory that is displayed is less	1. Ensure that:
than the total capacity of the installed physical memory	• All memory modules are the correct type
modules and you suspect a memory module problem.
	supported by the server. See “Memory module
	installation rules” on page 75.
	• You followed the memory module installation
	rules. See “Memory module installation rules” on
	page 75.
	• All memory modules are seated correctly and
	securely.
	• The system firmware is up-to-date.
	2. Reinstall the memory modules.
	3. Replace the suspect memory modules.

Chapter 7. Troubleshooting and diagnostics 163