Miscellaneous
error
messages
Message/Symptom
FRU/Action
Changing
display
colors
Display/Monitor
Computer
will
not
power-off.
See
“Power
Supply
Problems”
on
page
53.
1.
Power
Switch
2.
System
Board
3.
Riser
card
if
installed
Computer
will
not
RPL
from
server
1.
Ensure
that
network
is
in
startup
sequence
as
first
device
or
first
device
after
diskette
2.
Ensure
that
network
adapter
is
enabled
for
RPL
3.
Network
adapter
(Advise
network
administrator
of
new
MAC
address)
Computer
will
not
perform
a
Wake
On
LAN
®
(if
applicable)
1.
Check
power
supply
and
signal
cable
connections
to
network
adapter
2.
Ensure
that
the
operating
system
settings
are
set
to
enable
Wake
on
LAN
®
3.
Ensure
Wake
On
LAN
feature
is
enabled
in
Setup/Configuration
(see
“Starting
the
Setup
Utility
program”
on
page
49)
4.
Ensure
network
administrator
is
using
correct
MAC
address
5.
Ensure
no
interrupt
or
I/O
address
conflicts
6.
Network
adapter
(advise
network
administrator
of
new
MAC
address)
Dead
computer.
See
“Power
Supply
Problems”
on
page
53.
1.
Power
Supply
2.
System
Board
Diskette
drive
in-use
light
remains
on
or
does
not
light
when
drive
is
active.
1.
Diskette
Drive
2.
System
Board
3.
Diskette
Drive
Cable
Flashing
cursor
with
an
otherwise
blank
display.
1.
System
Board
2.
Primary
Hard
Disk
Drive
3.
Hard
Disk
Drive
Cable
Incorrect
memory
size
during
POST
1.
Run
the
Memory
tests
2.
Memory
Module
3.
System
Board
″
Insert
a
Diskette
″
icon
appears
with
a
known-good
diagnostics
diskette
in
the
first
3.5-inch
diskette
drive.
1.
System
Board
2.
Diskette
Drive
Cable
3.
Network
Adapter
Intensity
or
color
varies
from
left
to
right
of
characters
and
color
bars
1.
Display
2.
Video
adapter
(if
present)
3.
System
Board
No
power
or
fan
not
running
1.
See
“Power
Supply
Problems”
on
page
53.
78
Hardware
Maintenance
Manual
Summary of Contents for ThinkCentre A55
Page 1: ...Hardware Maintenance Manual Types 9636 9638 9640 9641 9642 9643 9644 9645 ...
Page 2: ......
Page 3: ...Hardware Maintenance Manual ...
Page 16: ...10 Hardware Maintenance Manual ...
Page 17: ...Chapter 2 Safety information 11 ...
Page 18: ... 18 kg 37 lbs 32 kg 70 5 lbs 55 kg 121 2 lbs 1 2 12 Hardware Maintenance Manual ...
Page 22: ...16 Hardware Maintenance Manual ...
Page 23: ...1 2 Chapter 2 Safety information 17 ...
Page 24: ...18 Hardware Maintenance Manual ...
Page 25: ...1 2 Chapter 2 Safety information 19 ...
Page 32: ...26 Hardware Maintenance Manual ...
Page 33: ...Chapter 2 Safety information 27 ...
Page 34: ...1 2 28 Hardware Maintenance Manual ...
Page 38: ...32 Hardware Maintenance Manual ...
Page 39: ...1 2 Chapter 2 Safety information 33 ...
Page 54: ...48 Hardware Maintenance Manual ...
Page 102: ...96 Hardware Maintenance Manual ...
Page 115: ...Chapter 8 Replacing FRUs 109 ...
Page 122: ...116 Hardware Maintenance Manual ...
Page 206: ...200 Hardware Maintenance Manual ...
Page 209: ......
Page 210: ...Part Number 42Y4652 Printed in USA 1P P N 42Y4652 ...
