1. Computer problem? Tech Support Guy is completely free -- paid for by advertisers and donations. Click here to join today! If you're new to Tech Support Guy, we highly recommend that you visit our Guide for New Members.

System Problem

Discussion in 'Hardware' started by howard.a.s, Jan 12, 2006.

Thread Status:
Not open for further replies.
Advertisement
  1. howard.a.s

    howard.a.s Thread Starter

    Joined:
    Jul 22, 2005
    Messages:
    492
    A while back my PC gave-up and despite all my best efforts I haven't yet been able to get it going again. I am hoping that someone out there can help me
    The PC is an Acer Aspire G600 with a Biostar M7NCG motherboard, AMD Athlon XP2400 processor, 512mb PC2700 RAM, 120gb HDD, running Windows XP Home SP2.

    The problem occurred when I re-booted the PC after it 'froze-up' or 'hung' during printing some documents.
    The PC powered-up but failed to get any further than that.
    The green operate light glows behind the front button, but after a few seconds goes-out altogether. Whilst the PC is powered-up, the green leds mounted in the keyboard flash on and off rapidly, as if signifying some sort of alarm?
    There appears to be no drive to the monitor, as the operate indicator on the TFT monitor remains orange, instead of turning green.
    I cannot hear any beeps at start-up, but I'm pretty sure that this system never does beep when booting under normal circumstances.

    I tried a process of elimination, removed one stick of RAM, then the other.
    I tried disconnecting CD drives and also swapping-out the HDD for another known good unit. I removed any internal cards fitted to the main board by myself over the last couple of years, in case any of them had failed.
    I also tried a replacement PSU.

    All of this failed to rectify the issue.

    When power is applied to the faulty PC the fans all run and the HDD can be heard to give a very brief first click or two. Then the operate light goes out, even though the system still appears to be running.

    Can anyone tell me whether this fault is likely to be due to the motherboard, or the processor, or both. Could it be due to both sticks of RAM being faulty? Or, am I overlooking something really small and obvious?
    Without a spare processor or motherboard or ram, how can I tell which may be the problem here?
     
  2. MysticEyes

    MysticEyes Banned

    Joined:
    Mar 30, 2002
    Messages:
    4,825
    You culd try resetting the BIOS. The easiest way would be to pull the battery out for a while.
     
  3. Gonzo1970

    Gonzo1970

    Joined:
    Dec 2, 2005
    Messages:
    112
    Should the resetting bios not work, I would try a different power supply.

    -Gonz
     
  4. MysticEyes

    MysticEyes Banned

    Joined:
    Mar 30, 2002
    Messages:
    4,825
     
  5. qldit

    qldit

    Joined:
    Mar 18, 2005
    Messages:
    3,390
    Good Afternoon Howard, that sounds very ungood!
    Try running just the motherboard removed from the case sitting on a table with just a basic set of parts, no drives.
    if that still has the same condition shoot for a motherboard.
    Are you familiar with how to do this?
    Cheers, qldit.
     
  6. howard.a.s

    howard.a.s Thread Starter

    Joined:
    Jul 22, 2005
    Messages:
    492
    Not really sure but can have a go. I do have a wrist band and will proceed with caution. When you say just the motherboard, do you mean with the processor fitted or removed?
    What will this show me that wouldn't be the same if the motherboard was fitted into its case?
    Thanks for the info.
     
  7. bigbear

    bigbear

    Joined:
    Apr 27, 2004
    Messages:
    4,719
    In your case not a lot, its more for when a new mobo has been installed and wont boot.
    The object is to see if the mobo will boot with minimum of hardware attached, cpu, one stick of ram and graphics card, if it still won't boot its probably a dead mobo.
     
  8. qldit

    qldit

    Joined:
    Mar 18, 2005
    Messages:
    3,390
    Good Morning Howard, there are often silly odd things that can cause a system to apear dead, but when the motherboard is removed to it's simplest arrangement on a table top does make a difference.
    This idea removes the possibility of standoffs causing electrical shorts or things like the earthing tabs on the rear escutcheon plate interfering with the board etc.

    So you can imagine having your kitchen table suitably covered with an insulating paper or a couple of large towels, the processor, memory, videocard (connected to monitor) with the removed power supply suitably situated and all things nicely set out and properly connected.
    Plug the power lead to the PSU and prepare to operate the array.
    Being extremely careful identify the Prw-SW pinouts on the corner of the board. (these are usually located with all the other HDDLED, and all those pins which would normally connect to the case front stuff)
    Carefully momentarily place a suitable conductive tool of some description to short circuit those two pins. A small screwdrive is usually OK, but be careful to only touch the two PWR sw pins. This will initiate and latch the system to run status.
    Keep an eye on your monitor for led status change to green. Observe for any screen activity if this can be achieved.
    If the problem remains you have virtually reached the end of the line.

    One thing not mentioned so far is the battery, usually a 2032 type, under different circumstances in different motherboards a flat or low battery can cause odd problems, so either check it's voltage at 2.8 volts or better try another good one.
    Usually the battery is fitted to the board with the +showing upwards, I have seen one that was in upside down.

    Enjoy the exercise, take your time and don't rush, you can try other arrangements like different memory sticks and practice analysis procedures, but remember to use care and unplug the power before any altereration is made.
    You can clip your wrist strap to the power supply case.

    Inspect the board for capacitors as in www.badcaps.net when this problem is apparent they swell or bulge at the top, the stamped cross is to enable a weak spot for them to burst or leak at that point.

    A sniff check is also worthwhile, carefully sniff the entire surface of the m/b.
    If an I/C fails they are often detected by the smell of burning silicon which is pretty distinctive.

    Cheers, qldit.
     
  9. MysticEyes

    MysticEyes Banned

    Joined:
    Mar 30, 2002
    Messages:
    4,825
    It has been mentioned and should be tried first.
     
  10. Sponsor

As Seen On
As Seen On...

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

Join over 733,556 other people just like you!

Loading...
Thread Status:
Not open for further replies.

Short URL to this thread: https://techguy.org/433508

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice