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Desktop video My computer hasnt been turning on sometime..it turn on sometime and it doesnt..like the monitor doesnt receive anything but the cpu is on.. and sometime it freezes when the computer turns on when sometime when that happen, some of the fan doesn't turns on!! i dont know whats wrong with it

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  • Tranceyboy May 29, 2008

    do you think i neeed a better power supply? and what do you mean short some where? like there's a loose wires?

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  • 55 Answers

Most probably its a issue with
1) SMPS / Power supply
2) Motherbaord - Short some where (Test it for earthing)

Posted on May 29, 2008

  • Sarvesh Sonawane May 30, 2008

    hi

    i think we need to DIGNOSE you each device one by one for fault.



    So lets get your hand dirty ..::.. :-)



    1) SMPS is not delivering proper power supply ->

    Through SMPS you computer converts various power supplies into computer

    for example HDD requires 5 Vold supply mother board required 12 V .

    So when smps in not delivering proper power to various hardwares so may be your computer can show the above symptoms.



    Check your SMPS

    Requirement :- Multimeter, Small metal wire/ Pin

    Steps:-

    1) Disconnected all outgoing connections from SMPS (for example power to motherboard, HDD, CD Rom etc)

    2) Now lovate the socket of SMPS which is used to connect to Motherboard (The Biggest one)

    3) Now inseart small wire / pin in to Green + Black wire (Short Green+Black)

    4) Now give power input to SMPS , which will make SMPS start working (Obeserve the FAN on backside , it starts rotating)

    5) Now take multimeter and check the voltage comming from each wire by putting Multimeters Black / Comm wire into BLACK Pin on SMPS`s Motherboard Connector.



    Please refer following diagram for Referrence of Output voltages from various cords






    (Otherwise you can refer the stikker sticked on SMPS box )



    So if all voltages are comming with proper desired ratings then we can conclude that SMPS is working fine





    2) Motherboard Short -->

    Here just cross check whether any Capacitor on mother board is swollended or not.

    Please refer following images




    Obeserv the swollen caps.



    if it is also not the case with your motherboard then there may not be problem with your motherboard (cheers ..::.. :-))

    These capacitors are getting swollen due to faulty power supply, faulti memmory modules etc.





    --



    Please reply the resolution

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