IBM 380Z manual Optional Device Checkout, Port Replicator Checkout, Self-Test

Optional Device Checkout

If you suspect an optional device problem, do either of the following:

“Port Replicator Checkout”

“External Monitor Self-Test”

Port Replicator Checkout

Do the following procedures to isolate a port replicator problem. A port replicator attaches to the system

expansion		connector	on the bottom	of	the	computer.
1.	Turn	off the	computer.
2.	Remove the failing devices			from	the	replicator.

3.Unplug the AC adapter from the replicator, if attached.

4. Remove the port replicator from the computer.

5.Reconnect the failing device directly to the computer. (If another device is already connected to the

	computer, remove it					first.)
6.	Go	to	the	“Running	the Diagnostics” on		page	34 and
	run	the	diagnostics.
7.	If	the advanced diagnostic device test does not find
	an	error,		suspect	a	problem with the	port	replicator of
	the	system		expansion		bus.

8.Turn off the computer and reconnect the port replicator.

9.Turn on the computer and run the following advanced

diagnostic		tests:
Serial		port	test	with	the	wrap	plug	installed	on
the	replicator
Parallel		port	test	with	the	wrap	plug	installed	on
the	replicator

10.If diagnostic errors appear, replace the replicator or diskette drive attachment unit.

If the problem remains after the replacement, replace the system board.

11.If power problems appear only when the replicator is used, replace the replicator.

External		Monitor	Self-Test
If	a	monitor	problem	occurs only when an external monitor
is	connected,		do the	following:

Note: Before you replace a monitor:

Check that the 95XX systems support either 63XX, 85XX, or 95XX displays.

Make sure that the external monitor is properly connected to the computer.

If the screen is rolling, replace the external monitor. If that does not correct the problem, replace the FRUs in the following order:

1. System board

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