IBM QS21 User Guide - Page 77

Power, problems

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Table 1. Explanation of LEDs and their states (continued) LED State Explanation Suggested action Activity LED Green There is network activity. No action required. For further information about troubleshooting networks, see "Network connection problems" on page 62. Power-on LED Flashing rapidly The service processor on the blade server is communicating with the BladeCenter Management Module. No action required Flashing slowly The blade server has power but Turn on if required is not turned on. Lit continuously (steady) The blade server has power and is turned on. No action required Not lit. Blade server not powered. 1. Reseat blade server. 2. Check if BladeCenter power supplies numbers 3 and 4 are installed and powered. If they are not, install and power them or use slots 1-5. 3. Go to "Power problems" 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 Chapter 7. Solving problems 61

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Table
1.
Explanation
of
LEDs
and
their
states
(continued)
LED
State
Explanation
Suggested
action
Activity
LED
Green
There
is
network
activity.
No
action
required.
For
further
information
about
troubleshooting
networks,
see
“Network
connection
problems”
on
page
62.
Power-on
LED
Flashing
rapidly
The
service
processor
on
the
blade
server
is
communicating
with
the
BladeCenter
Management
Module.
No
action
required
Flashing
slowly
The
blade
server
has
power
but
is
not
turned
on.
Turn
on
if
required
Lit
continuously
(steady)
The
blade
server
has
power
and
is
turned
on.
No
action
required
Not
lit.
Blade
server
not
powered.
1.
Reseat
blade
server.
2.
Check
if
BladeCenter
power
supplies
numbers
3
and
4
are
installed
and
powered.
If
they
are
not,
install
and
power
them
or
use
slots
1-5.
3.
Go
to
“Power
problems”
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
Chapter
7.
Solving
problems
61