© Copyright IBM Corp. 2001 1
IBM PC Server/Enterprise rack enclosures
General checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Power checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Powering off the rack . . . . . . . . . . . . . . . . . . . . . . . . . 3

General checkout

Use the following procedure for diagnosing keyboard, mouse, and video problems for
the IBM PC Server Rack Enclosure and the IBM Rack enclosures (Type 9306 and Type
9308).
For power problems, see “Power checkout” on page 2.
Attention:
•For Models 4QS, 4QX, 9QS, 9QX, 9TS, 9TX only:
Ensure that the voltage selector switch on e ach server installed in the server rack
is set to 230 V ac.
•For Models 200, 900 only:
Ensure that the voltage selector switch on e ach server installed in the server rack
is set to the proper voltage as supplied by the Power Distribution Unit, PDU.
1. Check the following:
•Ensure the external power cord is in good condition and properly connected
to a known-good power source.
•Ensure the internal power cables are in good condition and properly
connected. (The internal power cables connect between the power
distribution unit and the servers installe d in the server rack.)
•Ensure the following devices are powered on.
a. Power distribution unit
b. Server selector unit
c. All system units
d. Display
2. If the items/conditions specified in step 1. are not okay, correct the problem and
verify that the server rack is operating correctly.
3. If the items/conditions specified in step 1. are okay, then, using the server selector
keypad buttons, check the operation of the failing device for all of the servers that
are installed in the rack.
4. Did the failure occur on more than one se rver?
•NO: Go to the Hardware Maintenance manual for the server that was
selected when the failure occurred. Disconnect the keyboard and mouse from
the server selector unit and connect them d irectly to the failing server. Then,
run the server diagnostic programs on the failing s erver.
If the problem still remains, disconnect the keyboard and mouse from the
failing server and reconnect them to the server selector unit. Then, replace the
server rack components in the following order until the problem goes away.
a. Device cable (connects between the server selector unit and the server
that was selected when the failure occurred).