System Board External Connectors; Hard Disk Drive Backplane Connectors - IBM 7378 Problem Determination And Service Manual

System board external connectors

The following illustration shows the external input/output connectors on the system
board.
NMI button

Hard disk drive backplane connectors

The following illustrations show the connectors on the 2.5-inch and 3.5-inch hard
disk drive backplanes.
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IBM System x3400 M3 Types 7378 and 7379: Problem Determination and Service Guide
Video port
USB ports
Serial port
Ethernet
System
management