Lenovo ThinkCentre A52 (English) Quick reference guide - Page 43

Power, Supply, System, board, Diagnostic, Doctor, Diagnostics

Get Lenovo ThinkCentre A52 PDF manuals and user guides View all Lenovo ThinkCentre A52 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 43 highlights

Power Supply and System board Diagnostic LEDs You computer has two LEDs located on power supply on the back of the chassis. The power button LED located on front of your computer and the two LEDs on the back will help you determine if the power supply or system board is working correctly. The following table uses the LEDs to diagnose possible power supply and system board problems. Power Button LED Green LED Yellow LED Diagnosis Off Off Off Check the following first: v Is power cord plugged in? v Is the power strip on? Off (After On Off pressing the power button) On On On On On Off Failing power supply Failing system board Failing power supply Normal working conditions, but if your computer is not working correctly then you have a failing system board or a failing microprocessor If you cannot correct the problem, have your computer serviced. Note: To reset the computer once a yellow LED is on, unplug the power cord. PC Doctor for DOS Diagnostics The PC Doctor for DOS Diagnostics program runs independently of the operating system. You can use this program to test hardware components of your computer. You can use this program when other methods are not available or have not been successful in isolating a possible hardware problem. You can run the diagnostics from the Rescue and Recovery workspace on your hard disk. Alternatively, you can create bootable diagnostics diskettes from the Rescue and Recovery workspace. You can also download the latest version of the diagnostics program from http://www.lenovo.com/think/support/ on the World Wide Web. Type your machine type into the Use Quick Path field and click Go to find the downloadable files that are specific to your computer. Chapter 5. Troubleshooting and diagnostics 25

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
Power
Supply
and
System
board
Diagnostic
LEDs
You
computer
has
two
LEDs
located
on
power
supply
on
the
back
of
the
chassis.
The
power
button
LED
located
on
front
of
your
computer
and
the
two
LEDs
on
the
back
will
help
you
determine
if
the
power
supply
or
system
board
is
working
correctly.
The
following
table
uses
the
LEDs
to
diagnose
possible
power
supply
and
system
board
problems.
Power
Button
LED
Green
LED
Yellow
LED
Diagnosis
Off
Off
Off
Check
the
following
first:
v
Is
power
cord
plugged
in?
v
Is
the
power
strip
on?
Failing
power
supply
Off
(After
pressing
the
power
button)
On
Off
Failing
system
board
On
On
On
Failing
power
supply
On
On
Off
Normal
working
conditions,
but
if
your
computer
is
not
working
correctly
then
you
have
a
failing
system
board
or
a
failing
microprocessor
If
you
cannot
correct
the
problem,
have
your
computer
serviced.
Note:
To
reset
the
computer
once
a
yellow
LED
is
on,
unplug
the
power
cord.
PC
Doctor
for
DOS
Diagnostics
The
PC
Doctor
for
DOS
Diagnostics
program
runs
independently
of
the
operating
system.
You
can
use
this
program
to
test
hardware
components
of
your
computer.
You
can
use
this
program
when
other
methods
are
not
available
or
have
not
been
successful
in
isolating
a
possible
hardware
problem.
You
can
run
the
diagnostics
from
the
Rescue
and
Recovery
workspace
on
your
hard
disk.
Alternatively,
you
can
create
bootable
diagnostics
diskettes
from
the
Rescue
and
Recovery
workspace.
You
can
also
download
the
latest
version
of
the
diagnostics
program
from
on
the
World
Wide
Web.
Type
your
machine
type
into
the
Use
Quick
Path
field
and
click
Go
to
find
the
downloadable
files
that
are
specific
to
your
computer.
Chapter
5.
Troubleshooting
and
diagnostics
25