PC won't power up

By timothylagden
Sep 26, 2009
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  1. hi everyone,
    I've joined this group cause i'm in desperate need of help. a month back my both of my pc's stop working. i have just bought a ASUS P5KPL-AM SE G31+ ICH& motherboard, 2.5 dual core E5200 INTEL processor and 1gig ram. I've just put everything together and the pc won't power up when i push the power switch. I've tried both 300w and 350w power supplys and using the onboard graphics. I don't know if it is the power supplys because the motherboard lights up. The monitor has seperate power supply. I've also tried it in two boxes thinking that the power switch could be faulty, and still nothing.... could it be that both power supplys are too small? Any help would be greatly appreciated as the amount of money i've spent on this pc so far i could have just gone and bought a complete pc...
  2. Ritwik7

    Ritwik7 TechSpot Chancellor Posts: 2,288   +7

    Does your BIOS POST? (Do you hear any beeps when you turn on your PC?)
  3. Jawshh

    Jawshh TechSpot Enthusiast Posts: 438

    IMO the PSU is too weak. Try a 450W+ quality PSU. Can you tell us what have you put on the mobo?
  4. Code Butcher

    Code Butcher TechSpot Member Posts: 84

    Some MB have an extra power supply connector. Black and Yellow with 4 connectors.

    Is the Power switch properly connected PWR pins on the MB? Check that too.

    I have to agree with the others about PSU being at least 430W.
  5. Ritwik7

    Ritwik7 TechSpot Chancellor Posts: 2,288   +7

    The PSU would have been very weak had he been using a graphics card. However, without that, don't you think 350W is ok?
  6. Code Butcher

    Code Butcher TechSpot Member Posts: 84

    It still depends on the PSU. If it's Universal 24(20) Pin, PCI-Express rated (black and yellow 4 pin connector), PFC and S-ATA (optional).

    Personally I buy Thermaltake PSUs.
  7. Jawshh

    Jawshh TechSpot Enthusiast Posts: 438

    A 350W should have been working fine. I believe the PSU is not of good quality.
  8. timothylagden

    timothylagden Newcomer, in training Topic Starter

    thank you all for the help, i'll get a new PSU and try it. what size do you recommend as i'm gonna be buying a new graphics card and tv card as well, and have two internal hard drives and two dvd rewriters which need to go in as well.
    i don't wanna buy a new PSU everytime i add something to the motherboard.
  9. Ritwik7

    Ritwik7 TechSpot Chancellor Posts: 2,288   +7

    What graphics card will you be buying? I think the Corsair 650TX is the best option. However, if you'd like something a little cheaper you could go with the Corsair 450VX.
  10. Jawshh

    Jawshh TechSpot Enthusiast Posts: 438

    Get a 450-600W Seasonic/Corsair/OCZ/Antec/FSP PSU

    First put all hardware you have and hardware you are going to install in the future in this http://www.antec.outervision.com/

    and tell us what wattage you need
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