Chip level repairing Classroom Notes ?>

Chip level repairing Classroom Notes

Chip level repairing Classroom Notes


MOTHERBOARD

The motherboard is the main board in the system, and it is having “malty layer printed circuit board” and it is Manufacturer with Epoxy Material.Motherboard of 3 types

  1. Server Motherboard
  2. Desktop Motherboard
  3. Laptop motherboard

 

  1. In the desktop motherboard, (or) laptop motherboard, minimum, and maximum the only one processor. We are inserting, and this processor frequency is maximum 3.6 GHz in this motherboard maximum RAM capacity is 8GB supporting.

 

  1. In the motherboard server minimum one processor (and) maximum 64 and above processors we can insert, and this processor frequency is minimum 3.GHz and in this motherboard supporting RAM 512GB and above also.

 

The desktop motherboard again classified into four types

  1. Pentium 1
  2. Pentium 2
  3. Pentium 3
  4. Pentium 4

 

Pentium – III

            810, 810E, 815, 820

 Pentium – IV

            845, 865, 915, 945, 965, DG31, DG33, DG41, DG45

 

P-III Mother board’s Identification

  1. It is having AT power supply>> 6+6=12 pins connector & It is having ATX SMPS 20 pin
  2. It has ISA slot >>it is black color>>having 8-bits and 16 bits
  3. It has PCI slot>>it is WHITE color>>having 82 bits
  4. It has IDE1, IDE2>>40 pins connector
  5. It has floppy disk drive >>34 pins connector
  6. It has DIMM RAM slot >>it has 168 DIMM package connector
  7. Processor supports 450Mhz to 1.3Ghz
  8. Ram support 64MB to 256Mb
  9. It is having AGP slot >> it is in brown color>>having 64 bits

It has AMR slot >> it is brown color>> having 64 bits

  1. It has slot processor and socket processor

 

Slot Processer:-

Slot no.1          –           242 pin

Slot no.2          –           330 pin

 

Socket Processer:-

Socket no         –           370

 

P-IV Mother board’s Identification

  1. It has PCI slot >>it is WHITE color >>having 32 bit or yellow
  2. It is having IDE1,IDE2>> 40 pins connector
  3. It has floppy disk drive>>34 pins connector
  4. It has DIMM RAM slot >> it is having 168 pins DIMM package
  5. It is having ATX, power supply>> 20 or 24 or 28 pins connector
  6. Processor supports 1.5 GHZ to onwards
  7. RAM support 128 MB to 4 GB
  8. It has AGP slot>> it is brown color>> having 64 bits
  9. It has CNR slot>> it is brown color >>64 bits
  1. It has ATX SMPS 20 pin (or) 24 pin (or) 28 pin connector.
  2. It has SATA port seven pin connectors.
  3. It is having AGP slot, (or) EPCI slot, PCI slot, and CNR slot.
  4. It supports RAM maximum 8GB.
  5. It has the socket Processor

Socket No-       423

Socket No-       478

Socket No-       775

Socket No-       462

Socket No-       AM 2+

Socket No-       939

Socket No-       752

 

SLOT

PCI: – Peripheral connector interface.

It is 32-bit slot 33MHz Frequency No. of Pins 120 this is also called as universal slot be cows of any card we are inserting in this Slot (VGA Card, LAN Card, SOUND Card, TV Tuner, Modem Card, etc…).

 

Pin- Express (or) Extended peripheral connector interface.

It is the 64-bit slot 66MHz Frequency No. pins is 184 In this slot we are inserting the EPCI Graphic card this slot speed is 16x.

 

AGP: – the Accelerated Graphic Port.

It is the 64-bit slot 66MHz frequency No. pins is 124 In the slot we are inserting the AGP Graphic card this slot speed is 8x maximum.

 

AMR: – Audio modem raiser.

It is the 32-bit slot 33MHz frequency No. pins is 46 In the slot we are inserting the 32-bit modem card.

 

CNR: – Communication network raiser.

It is the 64-bit slot 66MHz Frequency No. pins 60. In the slot, we are inserting the 64-bit modem card.

 

SOUTHBRIDGE

It is the small BGA (Ball Grid Array) It is fairest to the processor It will control the signal of USB signal Audio signal PCI slot signal and Input-output signal except display signal this is also called as IOCH  “input-output controller hub.”

 

NORTHBRIDGE

It is the big BGA (Ball grid array) It is nearest to the processor, and it will control the signal of the display signal and processor signal and a RAM signal. The north bridge is also called as MCHmemory control hub.”

 

MANU FETCHER CAMPINESS OR SOUTHBRIDGE AND NORTHBRIDGE

  1. INTEL
  2. VIA
  3. SIS
  4. ATI
  5. NVIDIA
  6. AMD
  7. IBM

 

SMD IC: – Surface mountain drives integrated cruet

The SMD IC Dun by 3. Functions

  1. Power management function
  2. Generating the osculating (or) clock signal
  3. Error employ a tire

 

MANU FETCHER CAMPINESS ARE SMD IC

  1. ITE
  2. SMSC
  3. WINBOND
  4. ALI
  5. SMARTIE
  6. ENE
  7. SUPER IO
  8. MEGATRENDS

 

 

 

MICRO PROCESSERS

 

RISC: – Red used instruction set control

CISC: – Complex instruction set to control

CRISC: – Complex red used instruction set control

 

RISC PROCESSER:- Single take;

Ex :- 1+1+1+1= 4

 

CISC PROCESSER:-

Ex:- (1+1) (2+1) (3+1) =4

RISC Processer and CISC Processer used Desktop and Laptop.

 

MANU FETCHER CAMPINESS ARE MICRO PROCESSORES

INTEL

AMD

ZILOG

NATIONAL SEMY CONDECTOR

CYRIX

APPLE MAC

IBM

MOTOROLA

 

Intel :-

P-I, P-II, P-III, P-III Celeron, P-IV, P-IV Celeron, Cetrino

CISC Processers (Desktop and Laptop)

Dual core, Dore2 Dual, Core i3, Core i5, Core i7

Core2 extern

Core2 Quad

 

Laptop chip level training hyderabad

Laptop Core i3 computer

 

Based on the Physical Stretcher Micro Processer or 2types

  1. Slot Processer
  2. Socket Processer

 

SLOT PROCESSER

PINS – 121+121=242

SLOT PROCESSER in laptop

In that socket, Processor also 2 types

  1. Pin Processer
  2. Pinless Processer (or) Dot Processer

 

Socket Processors

 

PGA – Pin grid array

 

PGA – Pin gird array in Laptop

LGA – Line grid array

 

BIOS

 BIOS:- Basic Input Output system

Requirement of BIOS

  1. Identification of components whatever the devices the motherboard
  2. Booting purpose
  3. Security purpose

Based on the physical structure BIOS is 3 types

  1. Horizontal BIOS (or) Flat BIOS –  of pins
  2. Square BIOS –           32 pins
  3. 8pin BIOS –                 8 pins

PGA – BIOS in Laptop

 

Manufacturer companies (or) BIOS Chip

INTEL

WINBOND

SST

AMI

AWARD

PHONY

 

MANUFACTURE COMPANIES (OR) BIOS PROGRAMS

AMI

AWARD

PHONY

 

RAMS

SD RAM:-       84+84              168 pins           two notches         3.3v

DDR1 RAM:-  92+92              184 pins           one notches         2.5v

DDR2 RAM:-  120+120          240 pins           one notches         1.8v

DDR3 RAM:-    120+120          240 pins         one notches         1.5v

DDR-1——200 MHZ TO 400 MHZ——-having 184 pins

DDR 11—–400MHZ TO 800 MHZ——–having 240 pins

DDR111—-800 MHZ TO 1066 MHZ——having 184 pins

 

Types of RAM & Abbreviation:

  1. SRAM                     Static Random access memory
  2. Classic DDRAM      classic dynamic RAM
  3. FPM DRAM             Fast page mode dynamic RAM
  4. EDD RAM               enhanced dynamic RAM
  5. CDD RAM               cached dynamic RAM
  6. VRAM                      video ram
  7. EDO RAM               Extended dynamic RAM
  8. BEDO RAM             Burst external data output ram
  9. WRAM                    Windows ram
  10. SG RAM                 synchronous graphic ram
  11. DDR RAM               double data rate ram
  12. RD RAM                  Rambus dynamic RAM

 

 

BLOCK DIAGRAM OF THE MOTHERBOARD

MOTHERBOARD in computer

 

MANUFACTURE COMPANIES (OR) MOTHERBOARD

INTEL

AMD

MERCURY

MSI

ASUS

ASROCK

GIGABYTE

IBM

DELL

FRONTECH

BIOSTAR

 

Micro PROCESSER types in Computers

 

 

CRYSTAL

The clock signal first comes to the CRYSTAL after then it goes to the components.

 

SOUTH BRIDGE

The south bridge has one analog crystal.

  

CLOCK IC

The clock IC is rectangle type it will manage the clock signal to PROCESSER section, RAM section, and NORTHBRIDGE section.

clock IC in Computers

 

SOUND IC

The SOUND IC is managing the sound signal only. It is a square type IC and minuscule IC in same of the motherboard SOUND IC also given the one CRYSTAL.

 SOUND IC

LAN IC

The LAN IC is some of the motherboard RECTANGULAR and same of the SQUARE motherboard type. In the sum of the motherboard LAN IC near also, CRYSTAL is given.

 

LAN IC

 

 

AT  power supply

Power good signal

  1. +5V
  2. +12 V
  3. -12V
  4. GND
  5. GND
  6. GND
  7. GND
  8. -5V
  9. +5V
  10. +5V
  11. +5V

 

 

Pin no               Voltage

  1.                 +3.3 V
  2.                 +3.3V
  3.                  GND
  4.                 +5V
  5.                 GND
  6.                 +5V
  7.                 GND
  8.                 POWER GOOD
  9.                 +5V
  10.                  +12V
  11.                  +3.3V
  12.                 -12V
  13.                   GND
  14.                  POWER ON
  15.                 GND
  16.                  GND
  17.                  GND
  18.                  -5V
  19.                  +5V
  20.                  +5V

 

 

Pin no                 Colour

  1.                  Orange
  2.                  Orange
  3.                  Black
  4.                  Red
  5.                  Black
  6.                   Red
  7.                  Black
  8.                   violet
  9.                  Red
  10.                 Yellow
  11.                  Orange
  12.                  Blue
  13.                 Black
  14.                 Green
  15.                 Black
  16.                 Black
  17.                 Black
  18.                 White
  19.                 Red
  20.                 Red

 

 

 

IO PORTS

PS/2

 

PS/2

 

IN VIA CHIPSET  SIS also

 

 CHIPSET

 

 

IN INTEL CHIPSET

 INTEL CHIPSET

 

PS/2 TROUBLE SHOOTING

 

Keyboard & Mouse is not working (or) PS2 port is not working.

Check: –  The keyboard and Mouse are working are not. After checking the Capacitor, Coil and Resistors working are not. Next verify the continuity.

Dry solder the components replace the PS2 connector it will be working.

 

Serial Port

 

 Serial Port

Serial Port  TROUBLE SHOOTING

 

The modem is not detecting (or) serial mouse is not working.

First check the capacitor or capacitor pack working or not. Verify the continuity up to SERIAL IC finally replace the serial IC little heat serial IC in working and over heat will be serial IC not working. Then check the SERIAL IC.

 

VGA PORT

 

VGA PORT 

  

VGA PORT 1

 

In some of the motherboards

 

 motherboards 1

VGA PORT  TROUBLE SHOOTING

 

The display is not coming. Check the another VGA card display is coming. Now you can check the capacitors, coils, resistors, and transistor. Now verify the continuity. Dry shoulder the components. Still not working finally replace VGA connector.

 

 

USB PORT

 

By using USB port, we can connect up to 160 devices

 

 USB PORT

USB PORT  TROUBLE SHOOTING

 USB PORT 1

Pen drive is not detecting go to BIOS setup and check the USB port in enable or not. Verify the usb drivers installed or not. Now check the +5v incoming or not. In the USB port first pin checks, the capacitors and resistors are working or not. Next verify the continuity. Finally, replace the connector.

LPT PORT  (Line Printer Terminal)

 

 LPT PORT

LPT (PORT)  TROUBLE SHOOTING

 

Dot matrix printer is not detecting. Go to BIOS setup and check the LPT port is enabled or not. Verify the resistor packs working or not. In this mostly 99% resistor pack problem coming. Dry shoulder the resistor packs. After dry shoulder, also it’s not working. Finally, replace the LPT connector.

 

SOUND PORT

 

 SOUND PORT

 

SOUND (PORT)  TROUBLE SHOOTING

The sound is not coming or little volume in coming.

Small volume:- is coming that is compulsory dry shoulder resound section components before that. Still it is no volume. After change the sound IC.

The sound is not coming: – Check the sound drivers in correctly installed or not. Sound drivers are successfully installed still the sound is not coming replace the sound connector.

 

LAN PORT

 LAN PORT

 

LAN PORT1

LAN (PORT)  TROUBLE SHOOTING

The Internet is not coming. It’s checking the LAN settings still check the LAN cable is working or not. Check the LAN drivers incorrectly installed or not.

Not:- LAN IC problem LAN drivers are not installing check the continuity to the LAN IC. Minimum 4 pins worked or not still the problem is not solved replace the LAN connector.

LPT1 ( local printer terminal/ parallel  port)

 

Mother board side                          Printer SIdeOut                                              inOut                              InIn                                                 outIn                                               OutIn                                                out In                                                     OutOut                                                inOut                                               InIn                                                    outOut                                                 IinIn                                                      out

Pin no                       signal description

1                                      Strobe

2 to 9                               data signal

10                                     acknowledge

11                                      busy

12                                     paper end

13                                     select

14                                    auto  feed

15                                  error

16                                   INIT

17                                    select

18 to 25                           Ground

 

 

 

Midi or Game Port:

 

Midi or Game port:

 

 

1)+5V                                      6) Joystick           11)joystick direction

2)joystick button                      7)joystick button  12) out

3)joystick direction                  8)+5v                    13)joystick direction

4)the ground                                  9)joystick button   14)MIDI in

 

MIDI  ——Musical instrument digital interface

 

MIDI:

 

MIDI is the language spoken among musical instruments and computers.MIDI  is not audio signal, multimedia presentation that gives MIDI are more professional sounding and easier to create. They also are more efficient because the file sizes are smaller and therefore require less resolves to press the data. The PC needs a MIDI  interface to translate MIDI data to binary data.

 

Normally a MIDI interface is available with sound cards.

 

  • Pin SATA Data Pin Out

 

Pin number        Signal name

 

  1. Ground
  2. A+
  3. A-
  4. Ground
  5. B-
  6. B+
  7. Ground

 

 

 

 

1                DV1                 Digital video interface

2                DV1-1             Digital video interface- integrated digital &analog

3                 DV1-A            Digital video interface  — analog

4                TMDS            Transmission Minimized differential signaling

 

DVI TO LCD MONITOR

 

DVI TO LCD MONITOR

 

 

 

Pin no   signal

  1. TDMS Data 2-
  2. TDMS Data 2+
  3. TDMS Data 2/4  shield
  4. TDMS Data 4+
  5. TDMS Data 4-
  6. DDC clock
  7. DDC data
  8. Analog vertical sync
  9. TDMS data 1-
  10. TDMA data 1+
  11. TDMS data ½
  12. TDMS data 3-
  13. TDMS data 3+
  14. +5V
  15. GROUND
  16. Hot plug detect
  17. TDMS data 0-
  18. TDMS data 0+
  19. TDMS data 0/5 shield
  20. NILL
  21. NILL
  22. NILL
  23. TDMS clock +
  24. TDMS clock –

 

C2     Analog Green

C3     Analog  Blue

C4   Analog Horizontal sync

C5     Analog  Ground

 

 

34 pin floppy disk drive pin out

 

 

Pin number       Description

  1.                Ground
  2.                Standard density
  3.                Ground
  4.                 In use /Head loan
  5.                 Ground
  6.                  Drive select 3
  7.                 Ground
  8.                  Index
  9.                   Ground
  10.                  Drive select 0
  11.                 Ground
  12.               Drive select 1
  13.               Ground
  14.                 Drive select 2
  15.               Ground
  16.               Motor on
  17.              Ground
  18.              Direction
  19.              Ground
  20.              Step
  21.             Ground
  22.             Write data
  23.               Ground
  24.             Write gate
  25.             Ground
  26.             Track 00
  27.              Ground
  28.              Write protect
  29.               Ground
  30.              Read data
  31.              Side select
  32.               Ground
  33.               Disk change/Ready

 

 

40 pin IDE connector

 

Pin number                   Signal function

  1.                                      key
  2.                                     Ground
  3.                                    Data 15
  4.                                     Data 0
  5.                                     Data 14
  6.                                     Data1
  7.                                    Data 13
  8.                                   data 12
  9.                                   data 3
  10.                                   data 11
  11.                                    data 4
  12.                                    data  10
  13.                                    data 5
  14.                                    data 9
  15.                                     data 6
  16.                                    data 8
  17.                                    data 7
  18.                                    ground
  19.                                     Reset
  20. DMARQ
  21. GROUND
  22. I/O  Write data
  23. Ground
  24. I/O read data
  25. Ground
  26. I/O channel ready
  27. Un used
  28. DMA acknowledge
  29. Ground
  30. IRQ
  31. Host 16- bit

34                                           passed diagnostics

35                                           DAO

36                                           DA2

37                                          Host chip select 0

38                                         Host  chip selects  1

39                                           Drive  Active

40                                           Ground

 

 

SMPS (Switch Mode power supply)

ATX SMPS 24 Pin Connector Voltage

  1. +3.3v 3.3v
  2. +3.3v -12v
  3. Ground Ground
  4. +5v Power on
  5. Ground Ground
  6. +5v Ground
  7. Ground Ground
  8. Power good (+5v) -5v
  9. Standby (+5v) +5v
  10. +12v                                       +5v

 

 

Orange      –           +3.3v

Red            –           +5v

White        –           -5v

Yellow       –           +12V

Blue           –           12v

Green        –           Power on

Violet         –           Power good

Ayash         –           Stand by

Black         –           Ground

 

28 pin connector voltage (24+4only)

+12v          +5v

+3.3v         Ground

 

Before power on the SMPS Circuit

Standby voltage +5v and power on voltage +5v is coming to the power connector.

After power on the SMPS circuit

            The power on voltage becomes to “0.00” and reaming all the output voltage comes to the power connector.

 

 

Intel 845. Motherboard Power section “BEFORE” Power on the Motherboard  

  1.  BEFORE Power on Intel 845. Motherboard Intel 845. Motherboard Power section “AFTER” Power on the Motherboard
  2. after Power on Intel 845. Motherboard
  3. SQUARE BIOS
  4. SQUARE BIOS
  5. 1pin is dummy pin2pin is reset voltage (+2.5v to 3.3v)32pin is primary energy (+3.3v)31pin is clock signal (1.2v to 1.6v in multi miter)5to 13pins and 30 pins, 3pin 4pins there are address pins 14th to 29th pins theses all are data pins845 Motherboard power section before power on the Motherboard
    1. Standby voltage +5v and power on voltage +5v is coming to the power connector.
    2. Standby voltage is given to the One transistor.
    3. Transistor input voltage is (+5v) and Output voltage I (+3.3v) and (2.0v).
    4. Two voltages is given to the register through the ground.
    5. 3.3v is given to the “COMS” jumper setting nearest capacitor the capacitor shows +2.9v to 3.3v.
    6. 3v is given to the SOUTH BRIDGE closest one capacitor more than one capacitor also shows +3.3v it is working but at lost one capacitor shows 3.3v then SOUTH BRIDGE is working fine.
    7. Standby voltage +5v is given to the power store pin nearest capacitor. Through that capacitor, the +5v is given to the power start pin.
    8. The power on voltage +5v is given to the SMD IC nearest capacitor through this capacitor the power +5v is given to the SOUTH BRIDGE most adjacent crystal in multi-meter it shows 0.2v to 0.9v.

     

    845 Motherboard power section After power on the Motherboard

    1. The power voltage becomes to “0.00.”
    2. The power good voltage +5v is given to the “SMD IC.”
    3. The SMD IC input voltage is +5v and output voltages are +3.3v, +2.5v, +5v, +1.6v or +1.8v.
    4. The square BIOS primary voltage is +3.3 it shows at 32pin.
    5. The square BIOS reset voltage is +2.5v to +3.3v it shows at 2pin.
    6. The square BIOS clock signals voltage is shown in Multimeter 1.2v to 1.6v at 31st pin
    7. The CLOCK IC Main voltage is 3.3v and clock signal voltage is shown in Multimeter 1.2v to 1.6v
    8. Southbridge and NORTH BRIDGE Main voltage is +3.3v and reset voltage is 1.6v to 1.8v

     

    845 Motherboard PROCESSOR SECTION

     845 Motherboard PROCESSOR SECTION

     

     

    845 Motherboard “RAM” SECTION

     

     845 Motherboard “RAM” SECTION

     

     

    DDR 1 RAM SLOT VOLTAGE

    Ram Voltage   +3.3V (92pin)

    Reset Voltage  +2.5V (Notch beside 2nd pin)

    Data Voltage   1.2V to 1.6V (1st pin)

     

     DDR 1 RAM

    PCI SLOTS

    PCI SLOTS

    Any Motherboard PCI slots voltage is same.

     

    IDE PORT

    In same of the boards IED port, all tracks are given to the South bride. Directly or through resistor pack. Conduction

     

    TROUBLESHOOTING       NO POWER CONDUCTION

    NO Power or Motherboard is not power is not power on.

    1. Check the standby voltage and (+5v). And a power on voltage (+5v) is coming or not in the power connector.
    2. The standby voltage is given to the TRANSISTOR or FET, or VOLTAGE IC.
    3. Check the input voltage output voltage of the components (FET, TRANSISTOR) input voltage is +5 output voltage
    4. Check the CMOS Jumper setting is properly connected or not and check the voltage of the jumper setting (2.9v to 3.3v)
    5. Check the south bridge nearest (3.3v)
    6. Check the power start pin voltage (+5v) in the same of the motherboard voltage (3.3v)
    7. Check the SMD IC input voltage (+5v)
    8. Check the south bridge nearest CRYSTAL in multi-meter it shows (0.2v to 0.9v)
    9. Check the processor section (12v) FET is not working then processor FAN is one siècle it will be rotating and stop.
    10. Check the north bridge and south bridge nearest capacitors.
    11. Check the LAN IC is short or not.
    12. Check all the motherboard FET and POLARIZED CAPACITORS was working or not.
    13. Check with another BIOS the motherboard is on conduction that problem
    14. Finally replays the SMD IC

    TROUBLE SHOOTING

    SYSTEM AUTOMATICALLY HANGING OR RESTARTING OR SHUTDOWN.

    1. Go to BIOS setting and observe the same time in BIOS setting.
    2. In the BIOS setting the system is hanging or restarting or Shutdown that is the hardware problem.
    3. In the BIOS setting the system is not hanging or not restarting or not Shutdown that is the software problem.

    HARDWARE PROBLEM SULSTON

    Showdown, Restarting, Hanging.

    1. Check with another SMPS.
    2. Check with another RAM.
    3. Check with another processor FAN.
    4. Check with another BIOS.
    5. Verify the processor section and RAM section voltage.
    6. Check all the polarized capacitors is working or not.
    7. Check the BIOS voltages and CLOCK IC voltages.
    8. Check the south bridge and north bridge main voltage and reset voltage (1.6v to 1.8v)

     

    NO DISPLAY

    Board on condition but no display.

    1. Check the monitor is working or not monitor is working is fine.
    2. Check the COMS jumper setting is correctly connecting or not.
    3. The jumper setting is the 1 and 2.
    4. Clear the BIOS setting.
    5. Check the RAM and RAM slots are working or not.
    6. Check the SMPS all the voltage is coming correctly or not.

    Note:- All the voltages are coming except power good then board is on but no display.

    1. Check the processor is heating or not.
    2. Check with another processor FAN.
    3. Check the processor section voltages and RAM section voltages.
    4. Check with another VGA card hear the display is coming than that is the VGA port side problem.
    5. Check with another VGA card also till the no display.
    6. Check the BIOS voltages and another BIOS.
    7. Check the CLOCK IC voltages.
    8. Check the SMD IC is an input voltage output voltage.
    9. Check the southbridge and northbridge voltage.
    10. Check the entire board FETS or POLARIZED capacitors is working or not. (northbridge problem)

     

    915 Motherboard  Power section “BEFORE”  Power on

     

    915 Motherboard Power section “BEFORE” Power on

     

    915 Motherboard  Power section “AFTER”  Power on

     

    915 Motherboard Power section “AFTER” Power on

        

    915 Motherboard  Processors  section.

  6. 915 Motherboard Processors section
  7. 915 Motherboard  RAM section. 915 Motherboard RAM sectionDG31 MOTHERBOARD “BEFORE” POWER ON THE MOTHERBOARD.DG31 MOTHER BOARD “BEFORE” POWER ON THE MOTHER BOARDDG31 MOTHERBOARD “AFTER” POWER ON THE MOTHERBOARD.DG31 MOTHER BOARD “AFTER” POWER ON THE MOTHER BOARDDG31 MOTHERBOARD PROCESSOR SECTION. DG31 MOTHER BOARD PROCESSOR SECTIONDG31 MOTHERBOARD “RAM” SECTION.
  8. DG31 MOTHER BOARD “RAM” SECTION
  9. Hardware Troubleshooting Pc Boot Problems: (beep codes)
    indicator system status
    no beeps – no power loose cord, or short.
    1 short beep – normal post computer is ok.
    2 short beep – post error review screen for error code.
    continuous beep – no power loose cord, or short.
    repeating short beep – no power loose card, or short.
    one long and one short beep motherboard issue.
    one long and two short beeps video (mono/VGA display circuitry) issue.
    one long and three short beeps video (VGA) display circuitry.
    three long beep keyboard / keyboard card error.
    one beep blank or incorrect display video display circuitry.

     

    Problem With Power Supply Or CPU Chips: make sure the power connector is connected correctly and fitted firmly in the motherboard socket, some motherboards require two connectors from the power supply, refer to motherboard manual. if the problem persists try using a different power supply. check CPU fan, remove a chip and clear dust, make sure it is mounted properly. Video Card Problem: remove video card and inspect for cracks or bad connectors. make sure the video card mounted correctly in the slot, try using a different video card.

     

    Abbreviations 

     

    1. DMA Direct memory access
    2. PGA pin grid array
    3. BGA ball grid array
    4. FDD Floppy disk drive
    5. CGA color graphic adaptor
    6. VGA video graphic adapter
    7. AGP     accelerated graphic port
    8. PCI peripheral component interface
    9. ISA industrial standard architecture
    10. MCA micro channel architecture
    11. EISA extended industry standard architecture
    12. CMOS complementary metal oxide semiconductor
    13. BIOS basic input output system
    14. USB universal serial bus
    15. MIPS millions  of instructions per second
    16. MBPS mega bytes per second
    17. SMD surface mounted device
    18. IRQ interrupt request
    19. IBM international business machine
    20. AMD advanced micro device
    21. SIMM single inline memory module
    22. DIMM double inline memory module
    23. RIMM rambus inline memory module
    24. AMR audio modem racer
    25. CNR communication network racer
    26. ACR advanced communicated racer
    27. NIC network interface card
    28. LAN local area network
    29. ATA advanced technology extended
    30. FWH firm ware hub
    31. AT advanced technology
    32. UDMA ultra direct memory access control

     

    In server side used 94 pins

     

    SIDE  A

     

    Pin number    Signal

     

    1                 Ground

    2                +12v

    5                   VCC

    8                  VCC

    10                 VCC

    12           GROUND

    13            GROUND

    16              VCC

    18              GROUND

    21           +3.3V

    24         GROUND

    27          +3.3V

    30         GROUND

    33        +3.3V

    35          GROUND

    37        GROUND

    39        +3.3V

    42         GROUND

    45       +3.3V

    48     GROUND

    53      +3.3V

    56    GROUND

    59     VCC

    61     VCC

    62     VCC

     

    SIDE  B

     

    Pin number      Signal

     

    • 1         -12v

    3                ground

    5             vcc

    6           vcc

    12         ground

    13         ground

    15         ground

    17           ground

    19           vcc

    22         ground

    25          +3.3v

    28            ground

    31            +3.3v

    34            ground

    36             +3.3v

    38          ground

    41           +3.3v

    43             +3.3v

    46            ground

    49               ground

    54             +3.3v

    57            ground

    59            vcc

    61           vcc

    62              vcc

     

    AGP Bus connector

     

    SIDE A

     

    +12 V——–pin no 1

    VCC ——–pin no 9,16,28,45

    GND ——- pin no 5,13,19,31,37,43,49,55,61

     

    SIDE  B

     

    +5 V———2,3

    VCC ——-5,13,19,13,31,37,,43,49,55,61.

     

    CNR connector

     

    SIDE  A

     

    +12V——pin no   16

    +3.3v —–pin no 18

    +5v    —–pin no 19

    GND —–pin 3,6,9,14,17,20.

     

     

    SIDE   B

     

    +12V—–18

    +5V——-15

    +3.3V—–19

    GND——-4,7,10,13,17,20,23,27.

     

    Mother board spare parts numbers

    Small FET’s

     

    HJ882

    NIKOP3055L

    9916H

    APL1084

    NIKOL1085

    Alpha AS 2830

    761070

    PH 3055L

    23NO3L

    DI802

    NIKO P45NO2L

    DI202

    AMS 1085

    F3055L

    40N03

    3055

    NIKO 1084

    NIKO 1085

     

    Big FET’s

     

    3 LEADS — AMS1084

    5 LEADS—–E31FG UNISCAN

    AMS 1084

    AM  1505

         2 LEADS—–

  1. CETCEB 60302CET60NO35CETL31035NECK3296PHB 55 NO3LAAPL LO85F37115F37045MTB 1306MOR OCCO 3620L55N FO5L

    MOUSE  IC

     

    GD 75232 (P-III Boards)

    St  75182  ( Old boards(12v)

     

    Mini voltage IC

    ADP 3163

    ADP 3168

    RT 9248

    ADP 3160

    ADP 3165

    W 81301R

     

    DISPLAY  IC

     

    IDT 74FST

    ST 3384

    PISC  38610

    CMD 0317

    MIP 6008 CB

    RT  9602

     

    8 PIN IC

    ADP 3418

    SC  1205

    AD 33416

    ADP 3412

    ADP 3148 K

     VIA chip

    AT 82C58 VP

     

    SMSC

    FDC 37M62

    FDC 37C669

    SM4

    SM46

    SM 5C

     

    TTL  IC 14  PIN

    LX 1662 CP

    LX 74HCT

    LX74HC

    LM324

    HCT 14

    HC 14

    HIP 6302CB

    MI049 F9302

    SMD  IC

    Winbond company

     

    W83877

    W836274

    W8 3697 HF

    SMART 716

    W8 3637 HF

    W8 3977 EF

    833297

    8326

    8267

     

    ITE Company

    8660

    8661

    8612

    8712f

    87110

    8711

    86611

    87112gxi

    87112FX2

    97112BX2

    8705

    8705 FXS

     

    FAN  IC

     

    24 Pins

     

    RT-9222

    CM 2637

    SCM 86CSW

    SC 1185

    SC 1189

     

    28 PINS

     

    HIP 6019 DCB

    HIP 6020 CB

    HIP

    6021 CB

    RT 9229

    RT 9243

    Phase tink

    Malasiya 6916

    156524 CB

    US 3007 CW

    US 3004 CW

    RT 9231

    RT 9237

     

    20 Pins

     

    Raythem 7c5051

    Rt 9241

    Sc 2433w

    Limifinity LX 1665

    Unisem 3004 cw

    Unisem 3007 cm

    CM 2635

    CM 2633

    SC 2433

    SC  1153

    LP 93AGRC5054

     

    Supplies in Mother Board spare parts

     

    +3.3v                    +5v                    +12v             -5v                 -12v

    PCI                       Key board            PCI          ISA                CNR

    AGP                     Mouse                  AGP

    CNR                     USB                     CNR

    SMD IC                 Game port          CPU fan

    Southbridge         VGA                   8 pin IC

    Processor              FDD

    RAM slot                IDE

    IDF                        Procesor

    Crystal IC              south bridge

     

    +5v

    BIOS

    CNR

    SMD IC

    PCI SLOT

    ISA SLOT

    FET

     

    BIOS (basic input output system)

    Features of BIOS

    1. CPU support
    2. Chipset support
    3. Memory support
    4. Power management
    5. drive support
    6. PC 2007 operating system support
    7. Boot versatility support
    8. parallel port supports
    9. plug and play support
    10. PCI & AGP support
    11. USB support
    12. Antivirus support

     

    Beep codes for general identifications

    1. one short beep when display logo

     

    Solution: no error during POST ( power on self-test)

1. long beep in an endless loop

Solution: NO RAM installed or RAM not detected

 

2 One long beep followed by 3 short beeps

Solution:  video card not detected  or not found

 

3: High-frequency beeps when system is working

Solution:  CPU overheated system running at a lower frequency.

 

PHOENIX BIOS BEEP COEDS

Beep codes                            Problems

1,1,3( short)                            CMOS chip

1,1,4(short)                             BIOS failure

1,2,4(short)                              mother board

1,2,3 (short)                            mother board

1,3,1 (short)                            mother board

1,3,4 (short)                            mother board

1,4,1(short)                            mother board

4,3,1(short)                            mother board

1,4,2(short)                            memory module (RAM)

3,2,4(short)                             key board controller

1,2,1                                        system time error

2,,x,x(short)                            chipset error

3,3,4(short)                             video adaptor problem

4,2,4(short)                             expansion card failure

4,3,4(short)                            time of day clock failure

4,4,1(short)                            serial port error

4,4,2(short)                            parallel port error

4,4,3(short)                           co processor error

 

Standard IBM BIOS Beep codes

 

Beep codes                                  Problem

No beeps                                     power supply or system boot failure

One short beep                             post is ok

Two short beeps              post error with error code display on a screen

Repeating short beeps                power supply or system boot failure

1 long & 1 short beeps               system boot error

1 long & 2 short beeps               video display adapter failure

1 long &2 short beeps                 video display adapter error

3  long beeps                               keyboard error

 

AMI BIOS  Beeps codes

Beep codes                    Problems

1 short beeps                   post is ok

2 short beeps                  memory failure

3 short beeps                  memory or parity failure

4 short beeps                  system time failure ( the system clock timer

chip has failed)

5 short beeps                  motherboard failure

6 short beeps                  keyboard controller failure

7 short beeps                  CPU failure

8 short beeps                   video adapter failure

9 short beeps                    ROM BIOS check some error

10 short beeps                 CMOS read& write error

11 short beeps                 cache memory error

1 long, 3 short beeps        memory  failure

1 long, 8 short beeps        video adapter failure

 

Award BIOS beep codes

 

Beep codes                                   Problems

1 long beep                                     memory error

1 long, 2 short beeps                     video error

1 long,3 short beeps                      video failure

Continuous                                     memory or video failure

 

PROCESSOR SPEED & OPERATING VOLTAGE

 Model            Processor type           CPU speed                 Voltage

 

Intel                486 sx,486 dx,           66 MHZ,100MZ            5V,3.3V

486 dx2,dx4

 

Cyrex

AMD                  486 DX, 486 DX4        100MHZ                         3.3V

Intel                        P-1 old                  75 MHZ to 133MHZ         3.3V

p-1                                                      166MHZ to 233 MHZ        2.8V

Cyrex

IBM                       P-1                      pro 200 to 333 MHZ            2.9V

 

AMD                    P-1                      K6 350  to 550MHZ      2.2V to 3V

Intel                     P-11                     266 MHZ to 350MHZ              2V

Intel                     P-111                   400V to 1.2V                 7V,1.6V

Inetl                     P-1V                    1.5 GHZ  to 2.7GHZ            1.6V

For More information on Chip level repairing Classroom Notes please contact Chip level Repair trainer at our institute.

 

 

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