Lenovo ThinkCentre M50 Hardware Maintenance Manual (HMM) - Page 95

symptoms

Page 95 highlights

Beep symptoms Beep symptoms are short tones or a series of short tones separated by pauses (intervals without sound). See the following examples. Beeps 1-2-X 4 Description v One beep v A pause (or break) v Two beeps v A pause (or break) v Any number of breaks Four continuous beeps Use the following table to diagnose beep symptoms. Beep Symptom 1-1-3 CMOS read-write error 1-2-2-3 ROM BIOS check error 1-2-1 Programmable Interval Timer failed 1-2-2 DMA Initialization failed 1-2-3 DMA page register write/read failed 1-2-4 RAM refresh verification failed 1-3-3-1 1st 64K RAM test failed 1-3-2 1st 64K RAM parity test failed 2-2-3-1 Interrupt vector loading test failed 2-1-1 Secondary DMA register failed 2-1-2 Primary DMA register failed 2-1-3 Primary interrupt mask register failed 2-1-4 Secondary interrupt mask register failed 2-2-1 Interrupt vector loading failed 1-3-1-3 Keyboard controller failed 2-2-3 CMOS power failure and checksum checks failed FRU/Action 1. Run Setup 2. System Board System Board System Board System Board System Board 1. Memory module 2. System Board 1. Memory module 2. System Board 1. Memory module 2. Processor 3. System Board System Board System Board System Board System Board System Board System Board 1. System Board 2. Keyboard 1. Battery 2. System Board Chapter 7. Symptom-to-FRU Index 89

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Beep
symptoms
Beep
symptoms
are
short
tones
or
a
series
of
short
tones
separated
by
pauses
(intervals
without
sound).
See
the
following
examples.
Beeps
Description
1-2-X
v
One
beep
v
A
pause
(or
break)
v
Two
beeps
v
A
pause
(or
break)
v
Any
number
of
breaks
4
Four
continuous
beeps
Use
the
following
table
to
diagnose
beep
symptoms.
Beep
Symptom
FRU/Action
1-1-3
CMOS
read-write
error
1.
Run
Setup
2.
System
Board
1-2-2-3
ROM
BIOS
check
error
System
Board
1-2-1
Programmable
Interval
Timer
failed
System
Board
1-2-2
DMA
Initialization
failed
System
Board
1-2-3
DMA
page
register
write/read
failed
System
Board
1-2-4
RAM
refresh
verification
failed
1.
Memory
module
2.
System
Board
1-3-3-1
1st
64K
RAM
test
failed
1.
Memory
module
2.
System
Board
1-3-2
1st
64K
RAM
parity
test
failed
1.
Memory
module
2.
Processor
3.
System
Board
2-2-3-1
Interrupt
vector
loading
test
failed
System
Board
2-1-1
Secondary
DMA
register
failed
System
Board
2-1-2
Primary
DMA
register
failed
System
Board
2-1-3
Primary
interrupt
mask
register
failed
System
Board
2-1-4
Secondary
interrupt
mask
register
failed
System
Board
2-2-1
Interrupt
vector
loading
failed
System
Board
1-3-1-3
Keyboard
controller
failed
1.
System
Board
2.
Keyboard
2-2-3
CMOS
power
failure
and
checksum
checks
failed
1.
Battery
2.
System
Board
Chapter
7.
Symptom-to-FRU
Index
89