Repairs and Re-Setting System
PC
Explain Repair Step PC
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COMPETENCE MAPING
Dasar Kejuruan
Level I ( Kelas X )
Level III ( Kelas XII )
Level II ( Kelas XI )
2
1
3
Merakit Personal
Komputer
Menerapkan teknik elektronika
analog dan digital dasar
Melakukan instalasi perangkat
jaringan lokal (Local Area
Network)
Melakukan instalasi perangkat
jaringan berbasis luas (Wide Area
Network)
Melakukan instalasi
sistem operasi dasar
Menerapkan fungsi
peripheral dan instalasi PC
Mendiagnosis permasalahan
pengoperasian PC yang
tersambung jaringangnosis
Mendiagnosis permasalahan perangkat
yang tersambung jaringan berbasis
luas (Wide Area Network)
Menerapkan K 3 LH
Mendiagnosis permasalahan
pengoperasian PC dan
periferal
Melakukan perbaikan dan/ atau
setting ulang koneksi jaringan
an
Membuat desain sistem
keamanan jaringan
Melakukan perbaikan
Melakukan
perbaikandan/
dan/
atau
setting
ulang
sistem
PC
atau setting ulang
sistem
PC
Melakukan instalasi sistem operasi
jaringan berbasis GUI (Graphical User
Interface) dan Text
Melakukan perbaikan dan/ atau setting
ulang koneksi jaringan berbasis luas
(Wide Area Network)
Melakukan perbaikan periferal
Melakukan perawatan PC
Melakukan instalasi sistem operasi
berbasis graphical user interface (GUI)
dan command line interface (CLI)
Mengadministrasi server
dalam jaringan
Merancang bangun dan
menganalisa Wide Area
Network
Merancang web data base
untuk content server
Melakukan instalasi software
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Lulus
Explain Repair Step PC
Repair The PC
Investigate System Repair Result
PC Supply
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Module 5 Peripheral Perform Care
Learning Objectives
1. Training participants can diagnose problems
and the operation of PC peripherals.
2. Training participants are able to configure the
device and determine the specification PC,
including components on the input, process and
output.
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Repairs and Re-Setting System PC
Step - Step Repairs PC
•
To check the condition of computer hardware diagnostics
should be performed, namely :
1. POST (Power-On Self-Test)
2. Common diagnosis (routine)
3. Diagnosis and the search for damage
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Repairs and Re-Setting System PC
1. Diagnostic POST
The message can be: a message display on the screen, beep sound, or both.
Indication of a problem during POST stated :
– Error code: two to five digit number
– Error message: the short message in English (there are several messages that
indicate problemnya)
– Code beep: beep sound sequence
POST test duration depends on the size of the memory
capacity yangterpasang.POST does not check all additional
equipment / expansion, such as: printer, modem, etc..
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Module 4
Repairs and Re-Setting System PC
Step - Step POST
No
1
Beep
Code Description
Test 1 (Basic System)
check power supply, MPU, bus, and ROM
Test 2 (Extended System)
check the system timers, DMAC, DRAM 16KB initial location
and PIC
Test 3 (Display)
check the system control signal on the video card and monitor
VRAM
2
3
Test 4 (Memory)
4
5
6
check on the location of DRAM disampling with 16KB / dicuplik
Test 5 (Keyboard)
Test 6 (Drive)
check keyboard
One Long and one Short Beep = Motherboard issue.
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Repairs and Re-Setting System PC
Error Message During POST
No
Gejala
1
Test 1 (Basic System
Error)
the system stopped with no display and beep sound, even though the
cursor may appear.
2
Test
2
(Extended
System Error)
one long beep sound followed by a short beep sound, and POST
execution stopped.
Test 3 (Display Error)
a sound long beep followed by two short beeps sound, and the POST to
continue with the next test.
3
4
5
6
Test 4 (Memory Error)
Test 5 (Keyboard Error)
Test 6 (Drive Error)
Pesan/Peringatan Kesalahan
there are a number that indicates the display error code.
there are a number that indicates the display error code.
a display number 601, 1780, or 1781 that shows the error code.
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Repairs and Re-Setting System PC
Voters Error Code
No
Code
Voters Likely areas of damage
1
No beep
Power Supply
2
Beep continuously
Power Supply
3
Short beep repeatedly
Power Supply
4
1 long beep and 1 short beep
Motherboard
5
1 long beep and 2 short beeps
Video adapter Card
6
1 short beep and no display
Cable and a monitor or display
7
1 short beep and would not boot
USB disk, the disk or disk adapter
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Beep Code on the AMI BIOS
No
Beep
Beep Code Descriptions
1
1 short
DRAM refresh failure
2
2 short
Parity circuit failure
3
3 short
Base 64K RAM failure
4
4 short
System timer failure
5
5 short
Process failure
6
6 short
Keyboard controller Gate A20 error
7
7 short
Virtual mode exception error
8
8 short
Display memory Read/Write test failure
9
9 short
ROM BIOS checksum failure
10
10 short
CMOS shutdown Read/Write error
11
11 short
Cache Memory error
12
1 long, 3 short
Conventional/Extended memory failure
13
1 long, 8 short
Display/Retrace test failed
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Repairs and Re-Setting System PC
Beep code on the Award BIOS
No
1
2
3
4
5
Symptoms
1 short beep
Message or Warning Error
PC in a good condition
1 long beep
Memory Problem
1 long beep 2 short beeps
1 long beep 3 short beeps
Beep continuously
Damage in DRAM parity module
Damage at the VGA.
Corruption in the memory module or memory video
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Beep code on the IBM BIOS
No
Beep
Code Description
1
No Beeps
No Power, Loose Card, or Short.
2
1 Short Beep
Normal POST, computer is ok.
3
2 Short Beep
POST error, review screen for error code.
4
Continuous Beep
No Power, Loose Card, or Short.
5
Repeating Short Beep
No Power, Loose Card, or Short.
6
One Long and one Short Beep
Motherboard issue.
One Long and Two short Beeps
7
Video (Mono/CGA Display Circuitry) issue.
8
One Long and Three Short Beeps
Video (EGA) Display Circuitry.
9
Three Long Beeps
Keyboard / Keyboard card error.
10
One Beep, Blank or Incorrect
Display Video Display Circuitry.
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Repairs and Re-Setting System PC
Code Error Message
No
Code
Description
1
1xx
the system board
2
101
damage on the system board interrupt
3
102
timer on the system board
4
2xx
damage RAM Memory
5
201
damaged RAM Test
6
3xx
damage the keyboard
7
301
keyboard did not terespon
8
6xx
damage POST or floppy drive adapter
9
601
damaged floppy drive
10
17xx
damaged hard disk
11
1701
POST Damage on the unit's hard disk
12
18xx
damage Unit I / O expansion
13
1801
POST damage on Unit I / O expansion
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Repairs and Re-Setting System PC
2. General diagnosis
•
Include:
–system configuration,
–system configuration changes,
–disk format.
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Repairs and Re-Setting System PC
3. Diagnosis and the search for damage
•
Diagnosis includes three categories, namely:
– software (bad command or file name, disk not ready, internal
error, overflow)
– configuration error code (configuration too large for memory,
error 201 - system unit, 601 x parity chech)
– system lockup.
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Repairs and Re-Setting System PC
Evaluation
•
•
How do I solve the diagnosis and damage to the
computer?
What is POST and what can I do?
Task!
Turn on the PC, observe and record the process
going, match with the theory that there is!
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Repairs and Re-Setting System PC
Repairs and Re-Setting System
PC
Repair The PC
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Learning Objectives
1. Training participants can diagnose
the problems that some kinds of
peripherals installed in the computer.
2. Training participants can determine
how to complete.
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Repairs and Re-Setting System PC
Troubleshooting Motherboard
To know the problems that may occur :
¬ Check connection cable and main power supply voltage DC
cable.
¬ Check the keyboard cable connection.
¬ Check the monitor cable connection and a monitor power cable.
¬ Check CMOS configuration settings
¬ Check power cable connection and a USB data drive.
¬ Check all daughter board or card inserted in the slot I / O
¬ Check connection reset switch
¬ Check the position of the keyboard keys
¬ Check all IC installed
¬ Check the boot diskette in drive A
¬ Check speaker connections
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Repairs and Re-Setting System PC
1.
First Check. Power Supply
Check the power supply voltage level in the slot I / O
Diagnosis
¬ What is the main card is connected properly?
¬ What is power supply fan rotate?
¬ What is the connection P8 and P9 are connected with
the good?
If there is no voltage level on the pin connection P8 and P9
power supply, then a series of problems in the power
supply.
Improve power supply with how to change with the new power
supply.
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2.
Check 2. Clock signal
Measure signal CLK, OSC, PCLK, RESET drv, I / O CH RDY, I /
O CH chk pin slot on the I / O with a logic probe or osiloskope.
Diagnosis
¬ If no signal CLK, OSC, PCLK, check the crystal and a series of
clock generator.
¬ If the Reset drv always high, check the power good signal, a series
of power on reset and manual reset switch condition.
¬ If there is no signal I / O CH RDY and I / O CH chk check all loose
and daughter boards. If still problematic, the problem is on the
motherboard and the series
How improvement is to replace the motherboard with a new
motherboard.
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3.
Checks 3. CPU and DMA
Check the signal ALE, MEMR, MEMW, IOR, IOW, AEN with a
logic probe or osiloskope.
Diagnosis
¬ If the signal ALE, MEMR, MEMW, IOR, IOW not the credits, check
the motherboard CPU
¬ If the signal AEN is not balance, check the DMA.
How improvement is to replace the motherboard with a new
motherboard.
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4.
Check 4. Keyboard check
Check signal KBCLK, KBDATA on the keyboard
Reset the system and press the key on the keyboard check on the
signal path data keyboard
- Diagnosis
–
–
–
If KBCLK and KBDATA no damage from the keyboard
is on the line motherboard.
How improvement: replace the motherboard with a new
motherboard.
If KBCLK and KBDATA not have any damage from the
keyboard on the keyboard.
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Evaluation
1.
How do I diagnose a damaged Power Supply? Explain!
2.
How to diagnose a motherboard that error?
Task !
•
Open up a PC, Write about the hardware specifications of
the PC and then match it with existing PC documents. What
specification PC hardware installed in accordance with the
documents / information that is available?.
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Repairs and Re-Setting System PC
Repairs and Re-Setting System
PC
Investigate System Repair Result PC Supply
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Learning Objectives
• After learning of this study Training participants
can find out whether the improvement
peripherals have to work again or not.
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Troubleshooting power supply
1. For the type of TX
If the power switch is turned
on, the fan will rotate,
Voltage on the connector P8
and P9 when measured with a
voltmeter as shown in the
table is 3.1. Especially for
power good signal when
measured with the voltmeter
akan bertegangan +5 V down
momentarily and then be near
0V when power switch is
turned on.
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Picture. Power Supply Type TX
Repairs and Re-Setting System PC
Voltage Output Type of Power Supply TX
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•
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•
ISA Systems : Multi-lead cable (all models) model 25 286
PC, XT, AT model 25 model 30 model 30 286
P1 (PS8 on AT) J7 P3 J7
1 power good 􀂂 1 power good 􀂂1 1 power good 􀂂 same as model 25
2 n.c. (AT, +5V) 2 ground 2 ground
3 + 12 V 3 +12 V 3 + 12 V
4 -1 2 V 4 -1 2 V 4 -1 2 V
5 gr ound 5 gr ound 5 gr ound
6 gr ound 6 gr ound 6 gr ound
7 gro und
P2 (PS9 on AT) 8 gro und P4 J14
1 gr ound 9 -5 V 1 gr ound 1 gr ound
2 gr ound 10 +5 V 2 gr ound 2 gr ound
3 -5 V 11 +5 V 3 -5 V 3 +5 V
4 + 5 V 12 +5 V 4 + 5 V 4 + 5 V
5 +5 V 5 +5 V 5 +5 V
6 +5 V 6 +5 V
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2.
For the type of ATX
If the power switch is turned on or the power cord dicolokkan, the
fan still, all in the socket when the voltage is measured with a
voltmeter will be zero, except the pin 9 is +5 V as a voltage source
at the position stanby. If pin 14 is connected to the right with a 9 pin
cable, the fan will rotate, voltage on each pin socket 20 when
measured with a voltmeter as shown in the table is 3.2. Especially
for power good signal when measured with the voltmeter akan
bertegangan +5 V down momentarily and then be near 0V when
power is turned on.
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3.
Likelihood of Damage
Total dead (no output voltage on all pins)
Voltage output is not stable
+12 V output voltage greater
+12 V output voltage drop
No output voltage +5 V
There is no signal voltage on the power good
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4.
Procedure and troubleshooting
Check the existence of the voltage source from net, if
there is no (meaning there is damage to the voltage
source / fix dead jalajala / wait for life),
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• Check the power cable and connectors with a multimeter.
If the row to drop out / replace the cable that is still good,
• Check whether the fan rotates,
• Check all the pins on the DC voltage output connectors,
• Check the switch on / off the power supply.
• Check soldiran, path, connection components, and
electronic components (active components: Dioda,
transistor or SCR and pasip components: resistor,
capacitor, PTC, fuse).
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Flowchart Damage Power Supply
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Troubleshooting Keyboard
Keyboard some keyboard models, namely:
1. 83-Key PC Keyboard
2. 84-Key AT Keyboard
3. 84-Key Space-Saving Keyboard
4. 101-Key Keyboard
5. Other Keyboard Styles
Each button / key on the keyboard with the IBM declared a four:
1. Characters shown on the surface of the cover lock
2. Character code of each character key cover
3. The lock code reading
4. Decimal place of key figures
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Keys on the keyboard may be delayed or does not work because:
•
•
•
•
Clog sewage
The switch plate or per weak
Track dropouts
Damage to the chip that is inside
– To overcome this, the keyboard needs to be treated in a way:
1. avoid the entry of dirt and animals to the keyboard
2. to provide adequate air circulation on the keyboard
– If interference occurs, the steps that must be made, namely:
1.
2.
3.
4.
Module 4
remove the cover lock
clean up all the dirt is in
improve the per plate or a key subject
close the back cover lock as
Repairs and Re-Setting System PC
Keyboard Troubleshooting
Checking the general functions of the keyboard are:
Check the switch ¬ XT / AT (switch must be in a position for
connection to the AT-AT system)
¬ Check the keyboard lock on the front panel system is in open
condition
¬ Check cable connection and the keyboard is connected
properly with the system board. Connections that are less well
will cause problems.
¬ Check glowing LED on the keyboard during the power on
whether to flash
Module 4
Repairs and Re-Setting System PC
• Possible Damage
1. Keyboard does not operate a full
2. Some of the key does not work
3. The key is broken or depression
4. The keyboard interface
5. The keyboard connector
6. The keyboard cable
Module 4
Repairs and Re-Setting System PC
•
Module 4
Procedure and troubleshooting
1. The keyboard on the keyboard Mikrokontroller, soldiran passive
components on the keyboard dry, the PCB on the keyboard to drop
out. Or can be also caused by a series of interface units in the
system is broken. To isolate areas of damage can easily be done
in a way to connect the keyboard to either the unit system, the
problem disappears if the damage to the keyboard and if not then
the damage to the set of interface units in the system.
2. The logic pendekode row or column in the keyboard or the line
dropped out or PCB soldiran dry or casual contact. This problem
can be solved with the keyboard is good.
3. Apear drop out or switch depression. For that need to be replaced.
4. The keyboard on the motherboard chipset. To change this chipset
IC (SMD IC) or replace the motherboard is good.
5. Damage due to dropping out or interested in the frequency of use.
To replace the keyboard connector.
6. USB keyboard dropouts checked with the multimeter, and then to.
Repairs and Re-Setting System PC
• Use Diagnostic Software
• For testing the function can use the software
keyboard checkit,
• QA plus, PC tools, and Norton utilities. Facilities
provided in this software is not checking the button
is pressed or the lock-key keyboard.
Module 4
Repairs and Re-Setting System PC
Troubleshooting Floppy Disk Drive
or Hard Disk
Possible damage
Damage to the floppy disk drive
¬ The system displays the disk directory is not
suitable
¬ The system can not be read from all drives
¬ wrong when reading floppy disks written on a PC
the other
Damage to the hard disk
¬ The system can not booting from the hard disk
¬ disk performance decreases
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Diagnostic procedures and trouble shooting floppy disk drive
When reading the system disk in the floppy drive first, the
information on the FAT and root directory will be copied to
memory.
A copy of this disegarkan akan reading the content of the diskette
in the new. Replacement diskete line modifier resulted in
changing the disk. If this type of problem occurs, check jumpers
setting on the modifier line disk.
Check the data cable and power (check the LED lights a flame in
the drive)
Head dirty drive (clean the drive head with the cleaning head)
Possible damage to the series of logic drive (try to replace the
drive with another)
Possible damage to the controller (try to change the other
controller)
Due sesuainya not format the drive or disk is not appropriate. Try
reading the other floppy disks.
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• Diagnostic procedures and trouble shooting hard disk
• ¬ settings in the CMOS drive type does not match or lost
(run SETUP and autodetect the hard disk type)
• ¬ corrupted boot track (re-install the boot track using the
command SYS)
• ¬ BUFFERS in CONFIG.SYS is set too small (add / increase
the value of BUFFERS in CONFIG.SYS)
• ¬ SCANDISK Run program to manage data in the hard disk.
• ¬ Interleave does not fit (do low-level format)
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Evaluation
1)
What steps are needed to ensure that the conditions
peripherals remain in good condition?
2)
Corrective steps which needed to be damage to the
peripherals is not extended to the other peripherals?
Task !
1)
Read the Instruction Manual of each equipment
2)
Make improvements to the summary procedure of the
respective peripherals.
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References
Dikmenjur, 2004, Melakukan perbaikan dan/
atau setting ulang sistem PC , Modul TKJ
Dikmenjur, Jakarta
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THANKS FOR YOUR ATTENTION
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