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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:
v For Models 4QS, 4QX, 9QS, 9QX, 9TS, 9TX only:
Ensure that the voltage selector switch on each server installed in the server rack
is set to 230 V ac.
v For Models 200, 900 only:
Ensure that the voltage selector switch on each server installed in the server rack
is set to the proper voltage as supplied by the Power Distribution Unit, PDU.
1. Check the following:
v Ensure the external power cord is in good condition and properly connected
to a known-good power source.
v 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 installed in the server rack.)
v 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 server?
v 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 directly to the failing server. Then,
run the server diagnostic programs on the failing server.
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).
b. Server selector cable (connects between the server selector keypad and
the server selector unit).
c. Server selector keypad.
d. Server selector unit.
v YES: Power-off the server rack and replace the server rack components in
the following order until the problem goes away. See “Powering off the rack”
on page 3.
© Copyright IBM Corp. 2001 1