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PC won't boot up/fault

Discussion in 'Hardware' started by ricicle, 25 Mar 2008.

  1. ricicle

    ricicle

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    Help Guys,
    My PC at home will not boot up.There is no beep when I switch it on but there is some life as the hard drive sounds like it is spinning at twenty to the dozen, but there is no output to the monitor either so I can't see any faults.Switching off will not cure it, nor will CTRL,ALT + DEL.

    Any ideas gratefully received
     
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  3. disinfo

    disinfo

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    When i get PC's like this I usually disconnect all non essential components and reset the CMOS (should be some jumpers on your mainbaord)

    All you really need are your motherboard, ram, processor and a graphics card connected. If you switch the PC on and you see the BIOS screen, you can then start putting things in stage by stage and seeing if it boots up.
     
  4. duckegg

    duckegg

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    The most common component for this kind of fault is the power supply! You'll find other posts where people have experienced the same thing, and it always catches people out because as you say there does seem to be some life in it!

    If you've tried what disinfo has told you with no luck I would recommend borrowing a psu from somewhere and swapping it over to test it.
     
  5. disinfo

    disinfo

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    I've even known PS2 Keyboards and Mice to cause this behavior,

    When some Keyboards / Mice develop a fault they seem to short the PS/2 port preventing the computer from booting, although this is quite rare.

    Also I have known excessive amounts of dust in the RAM slot to cause this, sometimes taking the ram out and carefully vacuuming the slots can help/

    Duckegg is correct about the PSU, it may be giving the volts but not the juice.
     
  6. ToxixMess

    ToxixMess

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    AMI BIOS Beep Codes

    1 Short Beep One beep is good! Everything is ok, that is if you see things on the screen. If you don't see anything, check your monitor and video card first. Is everything connected? If they seem fine, your motherboard has some bad chips on it. First reset the SIMM's and reboot. If it does the same thing, one of the memory chips on the motherboard are bad, and you most likely need to get another motherboard since these chips are soldered on.
    2 Short Beeps Your computer has memory problems. First check video. If video is working, you'll see an error message. If not, you have a parity error in your first 64K of memory. First check your SIMM's. Reseat them and reboot. If this doesn't do it, the memory chips may be bad. You can try switching the first and second banks memory chips. First banks are the memory banks that your CPU finds its first 64K of base memory in. You'll need to consult your manual to see which bank is first. If all your memory tests good, you probably need to buy another motherboard.
    3 Short Beeps Basically the same thing as 2 beeps. Follow that diagnosis above.
    4 Short Beeps Basically the same thing as 2 beeps. Follow that diagnosis above. It could also be a bad timer
    5 Short Beeps Your motherboard is complaining. Try reseating the memory and rebooting. If that doesn't help, you should consider another motherboard. You could probably get away with just replacing the CPU, but that's not too cost-effective. Its just time to upgrade!
    6 Short Beeps The chip on your motherboard that controls your keyboard (A20 gate) isn't working. First try another keyboard. If it doesn't help, reseat the chip that controls the keyboard, if it isn't soldered in. If it still beeps, replace the chip if possible. Replace the motherboard if it is soldered in.
    7 Short Beeps Your CPU broke overnight. Its no good. Either replace the CPU, or buy another motherboard.
    8 Short Beeps Your video card isn't working. Make sure it is seated well in the bus. If it still beeps, either the whole card is bad or the memory on it is. Best bet is to install another video card.
    9 Short Beeps Your BIOS is bad. Reseat or Replace the BIOS.
    10 Short Beeps Your problem lies deep inside the CMOS. All chips associated with the CMOS will likely have to be replaced. Your best bet is to get a new motherboard.
    11 Short Beeps Your problem is in the Cache Memory chips on the motherboard. Reseat or Replace these chips.
    1 Long, 3 Short Beeps You've probably just added memory to the motherboard since this is a conventional or extended memory failure. Generally this is caused by a memory chip that is not seated properly. Reseat the memory chips.
    1 Long, 8 Short Beeps Display / retrace test failed. Reseat the video card.
     
  7. disinfo

    disinfo

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    Notice he said he had no beep, meeting its not POSTING
     
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  9. Gees

    Gees

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    Well worthwhile reseating processor as well as ram.then as above start with bare minimum and go from there
     
  10. ricicle

    ricicle

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    New power supply, motherboard and we're up and running again and a memory upgrade to boot :D

    Lost all me music though :(
     
  11. gcol

    gcol

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    What are you putting it down to - motherboard or power supply?
     
  12. Softus

    Softus

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    Did you store your music in the PSU? :confused:
     
  13. Gees

    Gees

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    I find a disk drive the best place to store data...;) ;)
    Your files should all be still there unless of course you made the fatal error of using your original disk drive for your new install...
     
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