IBM B50 manual Step, in theDiagnostics Information for, Multiple Bus Systems

Step 1520-5

One of the parts that was removed or unplugged is causing the problem. Install or connect the parts in the following order:

1.Fans

2.Riser card

3.Memory module(s)

4.System board cables (SCSI signal cables, diskette drive signal cable, serial port, Ethernet, speaker)

5.Diskette drive power cable

6.SCSI power cable(s), lowest bay to highest bay

7.Adapter cards, lowest slot to highest slot

8.External cable(s)

Turn on the power after each part is installed or connected. If the system does not power on or the power does not stay on, the most recently installed or connected part is causing the failure.

1.Turn off the power.

2.Unplug the power cord from the server.

3.Install or connect one of the parts in the list.

4.Plug the power cord into the server.

5.Turn on the power.

Does the fan in the power supply turn on and the power LED come on and stay on?

NO	Replace the last part you installed or connected. (If this part was a
	network adapter, see notes on page 2-1.)
	Repeat these steps until all the parts have been installed or connected.
	If the symptom did not change and all the parts have been installed or
	connected, call your service support person for assistance.
	If the symptom has changed, check for loose cards, cables, and obvious
	problems. If you do not find a problem, return to “Step 1520-1”on
	page 2-13and follow the instructions for the new symptom.
YES	Repeat these steps until all the parts have been installed or connected.
	Go to "MAP 0410: Repair Checkout	" in theDiagnostics Information for
	Multiple Bus Systems.

2-167046 Model B50 Service Guide