IBM QS21 Service Guide - Page 75

Power, problems, Network, connection

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Power problems Power symptom The blade server does not turn on. Suggested action 1. Make sure that: a. The power-on LED on the front of the BladeCenter unit is lit. b. The LEDs on all the BladeCenter power modules are lit. c. The power-on LED on the blade-server control panel is flashing slowly. v The power-on LED flashes rapidly for a short period to indicate it is communicating with Advanced Management Module. If the power-on LED to flash rapidly and continues to do so, the blade server is not communicating with the management module; reseat the blade server and reboot. v If the power LED is off, either the blade bay is not receiving power, the blade server is defective, the Advanced Management Module firmware is an earlier version and does not support this function, or the LED information panel is loose or defective. d. Local power control for the blade server is enabled. Check using the Advanced Management Module Web interface. The blade server might have been instructed through the Advanced Management Module to turn on. 2. If you have just installed a new option in the blade server, remove it, and restart the blade server. If the blade server now powers on, troubleshoot the option. See the documentation that comes with the option for further information. 3. Try another blade server in the blade bay. If it works, you may need to have a trained service technician replace the system blade assembly. Power throttling Be aware that the BladeCenter unit automatically reduces the BladeCenter QS21 processor speed if certain conditions are met. One such condition is temperature thresholds being exceeded, for example, when the blade server is running in acoustic mode. This throttling occurs independent of your power configuration. Full processor speed is restored automatically when the conditions that have caused the throttling have been resolved. Network connection problems Network connection symptom One or more blade servers are unable to communicate with the network. Suggested action Make sure that: v The switch modules for the network interface being used are installed in the correct BladeCenter bays and are configured and operating correctly. v The settings in the switch module are correct for the blade server (settings in the switch module are blade server specific). For additional information, see: v Chapter 2, "Configuring the blade server," on page 9 v The Problem Determination and Service Guide that comes with your BladeCenter unit v Other product-specific documentation that comes with the switch module Note: For the latest editions of the IBM BladeCenter documentation, go to http://www.ibm.com/support/us/en/. If the problem remains, see "Solving undetermined problems" on page 95. If all the blades cannot communicate with the network, check the network itself for problems. Chapter 5. Diagnostics and troubleshooting 57

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Power
problems
Power
symptom
Suggested
action
The
blade
server
does
not
turn
on.
1.
Make
sure
that:
a.
The
power-on
LED
on
the
front
of
the
BladeCenter
unit
is
lit.
b.
The
LEDs
on
all
the
BladeCenter
power
modules
are
lit.
c.
The
power-on
LED
on
the
blade-server
control
panel
is
flashing
slowly.
v
The
power-on
LED
flashes
rapidly
for
a
short
period
to
indicate
it
is
communicating
with
Advanced
Management
Module.
If
the
power-on
LED
to
flash
rapidly
and
continues
to
do
so,
the
blade
server
is
not
communicating
with
the
management
module;
reseat
the
blade
server
and
reboot.
v
If
the
power
LED
is
off,
either
the
blade
bay
is
not
receiving
power,
the
blade
server
is
defective,
the
Advanced
Management
Module
firmware
is
an
earlier
version
and
does
not
support
this
function,
or
the
LED
information
panel
is
loose
or
defective.
d.
Local
power
control
for
the
blade
server
is
enabled.
Check
using
the
Advanced
Management
Module
Web
interface.
The
blade
server
might
have
been
instructed
through
the
Advanced
Management
Module
to
turn
on.
2.
If
you
have
just
installed
a
new
option
in
the
blade
server,
remove
it,
and
restart
the
blade
server.
If
the
blade
server
now
powers
on,
troubleshoot
the
option.
See
the
documentation
that
comes
with
the
option
for
further
information.
3.
Try
another
blade
server
in
the
blade
bay.
If
it
works,
you
may
need
to
have
a
trained
service
technician
replace
the
system
blade
assembly.
Power
throttling
Be
aware
that
the
BladeCenter
unit
automatically
reduces
the
BladeCenter
QS21
processor
speed
if
certain
conditions
are
met.
One
such
condition
is
temperature
thresholds
being
exceeded,
for
example,
when
the
blade
server
is
running
in
acoustic
mode.
This
throttling
occurs
independent
of
your
power
configuration.
Full
processor
speed
is
restored
automatically
when
the
conditions
that
have
caused
the
throttling
have
been
resolved.
Network
connection
problems
Network
connection
symptom
Suggested
action
One
or
more
blade
servers
are
unable
to
communicate
with
the
network.
Make
sure
that:
v
The
switch
modules
for
the
network
interface
being
used
are
installed
in
the
correct
BladeCenter
bays
and
are
configured
and
operating
correctly.
v
The
settings
in
the
switch
module
are
correct
for
the
blade
server
(settings
in
the
switch
module
are
blade
server
specific).
For
additional
information,
see:
v
Chapter
2,
“Configuring
the
blade
server,”
on
page
9
v
The
Problem
Determination
and
Service
Guide
that
comes
with
your
BladeCenter
unit
v
Other
product-specific
documentation
that
comes
with
the
switch
module
Note:
For
the
latest
editions
of
the
IBM
BladeCenter
documentation,
go
to
If
the
problem
remains,
see
“Solving
undetermined
problems”
on
page
95.
If
all
the
blades
cannot
communicate
with
the
network,
check
the
network
itself
for
problems.
Chapter
5.
Diagnostics
and
troubleshooting
57