Diagnosis and Troubleshooting on Motherboard

Diagnosis and Troubleshooting on Motherboard
Diagnosis and Troubleshooting on the motherboard, this theory there exist on the network computer engineering module To find or determine the type of damage that exist on the PC is required inspection of the condition of the hardware on the computer. These checks include: POST (Power-On Self-Test), a common diagnosis (routine), and seek diagnosis and solve the damage. From the results of this examination will be known location of the damage and the type of damaged components for later improvement against parts experiencing the damage.

a). The problems that may occur
The computer system consists of a motherboard, daughter boards, power supply, floppy drives, monitors, keyboards, and some equipment that is connected through connectors and cables. Problems in the equipment will affect the operation of other equipment and sometimes interfere with the operating system. Following checks will help solve the problem.

    Check the main power supply cable connections and the DC voltage cables.
    Check the keyboard cable connection.
    Check the monitor cable connection and the monitor power cable.
    Check the CMOS configuration settings
    Check cable connections drive power and data cables.
    Check all daughter board or card installed in the slot I / O
    Check the connection reset switch
    Check the position of the keyboard lock
    Check all IC attached
    Check the boot disk in drive A
    Check the speaker connection
After all the checks carried out, turn on the power switch and find a POST error message. Issue of POST messages can be localized and repaired. When the POST can not run, then the problem occurs on the motherboard and circuit inside. By checking the signal at the I / O slot on the motherboard damage problems can be identified because all signal connected to the CPU I / O slot.
b). Procedure Diagnosis and Troubleshooting
1). Checks 1. Power Supply

Check the power supply voltage level at I / O slot

Diagnosis

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

If there is no voltage level at the connection pins P8 and P9 power supply, then there's a problem in the power supply circuit. Fix the power supply by replacing with a new power supply.
2) Check 2. Signal clock

Measure signal CLK, OSC, PCLK, RESET DRV, I / O CH RDY, I / O CH CHK pin slot I / O using the logic probe or osiloskope.


 Diagnosis

    If no signal CLK, OSC, PCLK, check the crystal and clock generator circuit.
    If RESET DRV is always high, check the power good signal, a series of power on reset and manual reset switch condition.
    If no signal I / O CH RDY and I / O CH CHK off and check all daughter boards. If the problem persists, the problem is on the motherboard and the circuit. How to repair is replace the motherboard with a new motherboard.

3) Checks 3. The CPU and DMA

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

    If the signal ALE, MEMR, MEMW, IOR, IOW no pulse, check the motherboard CPU section
    If the signal AEN no pulse, turn on DMA.

How to repair is replace the motherboard with a new motherboard.
4) Checks 4. Checks Keyboard

    Check the signal KBCLK, KBDATA on keyboard
    Reset the system and press the key on the keyboard checks the signal on the data line keyboard
Diagnosis

If KBCLK and KBDATA there is no damage from the keyboard to the motherboard lines. 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 internal damage (motherboard and components that are inside / system board) and external (power supply, keyboard, mouse, disk drives, hard drives, and peripherals support).
    General damages that occur due to the lack of good connections / relationships between peripherals with the motherboard.
    The initial steps must be taken to improve the PC is to check the connection / connection of peripherals to a motherboard and a voltage source.
    PC motherboard repairs carried out by repairing or replacing parts / components are damaged.
5) Replacement components must be in accordance with the specifications.

Hopefully you helped with Diagnostics and Troubleshooting on Motherboard information please visit http://www.tumilaspeed.com