Technical data

System FRU Removal

Before Starting

Perform these preliminary steps before removing and replacing a

FRU.

Step Action

1 Verify that the symptom is not caused by improper

conﬁguration or a loose cable.

2 Conﬁrm with the customer that data has been backed

up. If not, the data could be lost (when a hard disk is at

fault).

3 Ensure that the operating system is shut down before

turning off the system or halting the CPU.

4 Enter the SHOW CONFIG command and write down the

following information:

— System ROM version

— Graphics type

— Memory conﬁguration

Verify that the conﬁguration agrees with the

amount and type of memory modules present. If

the conﬁguration does not agree, verify that the

memory modules are installed correctly.

— SCSI devices and IDs

Verify that the conﬁguration agrees with the actual

hardware. If the conﬁguration does not agree, ensure

that the following are true:

SCSI IDs are all unique.

Cables are correctly installed.

The expansion box power is turned on ﬁrst.

5 Wait three minutes after turning off a monitor before you

move or service it.

Continued on next page

6–3