Sunday, December 23, 2012

To locate or determine the type of damage that is PC required inspection of the condition of the computer hardware. These checks include: POST (Power-On Self-Test), general diagnosis (routine), and finding and solving damage diagnosis. From the results of this examination will be found the site of damage and the type of damaged components to then be repair to the damaged part. 

1. Motherboard Troubleshootinga 
2. The problems that may occur  

The computer system consists of a motherboard, daughter boards, power supply, floppy drives, monitor, keyboard, and some equipment connected via the connector and cable. The problem in the equipment will affect the operation of other equipment and sometimes interfere with the operating system. The following checks will help solve the problem. 

¬ Check the cable connection and the main power supply voltage DC wiring. 

¬ Check the keyboard cable connection. 

¬ Check the monitor cable connection and the monitor power cable.  

¬ Check CMOS configuration settings  

¬ Check the connection of the power cable and data cable drive.

¬ Check all daughter board or card that is installed in slot I / O  

¬ Check the connection of the reset switch  

¬ Check the position of the keyboard 

¬ Check all IC attached ¬ Check the boot disk in drive A 
¬ Check the speaker connection 

After all the checks done, turn on the power switch and look for POST error messages. From the POST message problem can be localized and repaired. When the POST does not work, then the problem occurs on the motherboard and circuit therein. By checking the signal on the slot I / O problem of damage to the motherboard can be identified because all signals are connected to the CPU slot 

I / O. b) Procedure Diagnosis and Troubleshooting 

(1) Check 1. Power Supply 

Check the voltage level of the power supply in the slot I / O Diagnosis 

¬ Is the main card plugged in?  
¬ Is the power supply fan spinning? 
¬ Is the connection P8 and P9 is connected properly? 

If the voltage level on the pin no connection P8 and P9 power supply, then the problem is in power supply circuit. Fix it by replacing the power supply with a new power supply.  

(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 using a logic probe or osiloskope.
 
Diagnosis 


¬ If no signal CLK, OSC, PCLK, check the crystal and clock generator circuit.


¬ If RESET DRV always high, check the power good signal, the circuit power on reset and manual reset switch conditions.

¬ If no signal I / O CH rdy and I / O CH CHK off and check all the daughter boards. If the problem persists, the problem is on the motherboard and place settings. How to repair is replace the motherboard with a new motherboard.  

 (3) Check 3. CPU and DMA  

Check signal ALE, MEMR, MEMW, IOR, IOW, AEN using logic probe or osiloskope. 


Diagnosis 

¬ If no signal CLK, OSC, PCLK, check the crystal and clock generator circuit. 

¬ If RESET DRV always high, check the power good signal, the circuit power on reset and manual reset switch conditions. 


¬ If no signal I / O CH rdy and I / O CH CHK off and check all the daughter boards. If the problem persists, the problem is on the motherboard and place settings. How to repair is replace the motherboard with a new motherboard.  


(3) Check 3.  CPU and DMA 

Check signal ALE, MEMR, MEMW, IOR, IOW, AEN using logic probe or osiloskope.
 
Diagnosis 


¬ If the signal ALE, MEMR, MEMW, IOR, IOW not a pulse, check the CPU motherboard  

¬ If the signal AEN no pulse, check the DMA. How to repair is replace the motherboard with a new motherboard. 

Check 4. Check Keyboard  

¬ Check signal KBCLK, KBDATA on keyboard  

¬ Reset the system and press a key on the keyboard checks the keyboard data signal on line 

Diagnosis 

If KBCLK and KBDATA any of the keyboard there is damage to the motherboard line. How to repair is replace the motherboard with a new motherboard. If KBCLK and KBDATA no damage from the keyboard on the keyboard. 

Summary 
Damage to the PC consists of an internal (motherboard and the components that are inside / system board) and external (power supply, keyboard, mouse, disk drives, hard drives, and peripherals support). 

Damage caused by a common lack of good connections / relationships between peripherals to the motherboard. 

The first step that must be taken to improve the PC is to check the connection / peripheral connection to the motherboard and power supply. 

Repair PC motherboard is done by repairing or replacing parts / components are damaged. Replacement components must conform to its specifications.     



   

4 comments:

  1. Are you suffering A big problem for the laptop and Mobile like hitting, On/Off, motherboard, Charger, Fan, Hard Disk, laptop computer repair, laptop repair, laptop screen repair, computer screen repair, Mac laptop repair, laptop LCD screen repair, dell laptop screen repair, HP laptop screen repair. The problem then Chipmentor Laptop and Mobile Service Center give the instant solution for your Laptop. Laptop Service center in Delhi Phone Number: 011-47562553
    Laptop Repairing Institute


    Laptop Repairing Institute

    ReplyDelete
  2. Great article on motherboard repair troubleshooting. One must be cautious in dealing with such issues and better let the Desktop repair professionals to handle such issues.

    ReplyDelete
  3. TollFree +1(855)837-9965! Repair All PC, LLC in Cleveland Ohio. Our Microsoft certified professionals & System Engineers which provide Best Tools and Expert Solutions to all you issues on repairallpc.net

    ReplyDelete