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pc wont boot - whats broken?

Discussion in 'General Hardware' started by gettothechopper, 15 Mar 2010.

  1. gettothechopper

    Mobster

    Joined: 22 Feb 2010

    Posts: 4,403

    Location: Southampton

    ok so its not:

    monitor
    graphics card
    memory
    HD


    fans all spin (graphics card fan spins at full blast)
    HD is spinning
    DVD drive is working

    no lights on USB mouse or keyboard
    screen stays on standby
    power light / case light is working
    no beeps

    power supply, motherboard or processor?
     
  2. Phage

    Wise Guy

    Joined: 18 Jun 2009

    Posts: 1,787

    Location: Kent

    Start unplugging stuff like DVD etc - if it eventually posts, it's the PSU being unable to deliver enough power.
    Assume all cables checked that they're fully into their sockets ?
    Any OC done previously ?
    Can you swap any components with another system to check ? PSU first...
     
  3. CooK1E

    Gangster

    Joined: 22 Dec 2009

    Posts: 493

    Remove the GFX card - it should give you beeps to warn of missing card. Same with the memory, if not then it could be a dead board. Would be good if you can start subbing parts as this is the best indicator of whats gone wrong.
     
  4. gettothechopper

    Mobster

    Joined: 22 Feb 2010

    Posts: 4,403

    Location: Southampton

    problem persits with or without HD / DVD plugged in
    no beeps with or without graphics card
    no beeps with or without memory
    checked cables on everything

    sounds like motherboard? going to test psu tomorrow
     
  5. Redmint

    Mobster

    Joined: 28 Jan 2010

    Posts: 3,190

    Location: Guildford

    Yep, lack of beeps would suggest the mobo or psu is dead.
     
  6. Trancer

    Gangster

    Joined: 29 Aug 2003

    Posts: 174

    Location: Wales

    I've seen this type of problem before and it has been the RAM. Can you try just one stick, or get some from someone else?

    Also try clearing the CMOS which will set the BIOS back to factory settings.
     
  7. Redmint

    Mobster

    Joined: 28 Jan 2010

    Posts: 3,190

    Location: Guildford

    Usually the system will at least beep without the RAM...
     
  8. gettothechopper

    Mobster

    Joined: 22 Feb 2010

    Posts: 4,403

    Location: Southampton

    its not the ram- ive tested it in another machine

    ive tried the old bios reset too
     
  9. Trancer

    Gangster

    Joined: 29 Aug 2003

    Posts: 174

    Location: Wales

    Sounds a bit like it could be the motherboard then.