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Thread: no display

  1. #1
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    Question no display

    Hi all.I've got a problem that I hope someone here might be able to help me with.I was given a system box,which I know had been working perfectly at my daughter's place.
    Upon getting it home,I plugged it in,and got a "no video signal"message on screen.After a few re-starts,system booted,and worked normally.Next day,when started,nothing on screen at all.The hard drive is running,as are all fans.The monitor light stays yellow,instead of going green after a normal start up
    I searched google for"no display",and came up with the following :
    Switched monitor with known working one:no result
    Removed graphics card and replaced with known working one:no result
    Removed and reseated RAM:no result
    Replaced bios battery(CR2032)on motherboard:no result
    Restarted while pressing F8 for safe mode:no result
    One site mentioned re-setting the bios via the jumper,but I'm loath to try this,as I don't know how to reload bios.
    I'm at my wits end with this thing.Is there anything I've overlooked?
    Has the motherboard itself died?
    Here are the specs of the system,if that is any help:

    DFI AD73 Pro motherboard-Athlon XP1800+
    GeForce MX400-64MB graphics
    512 MB DDR ram
    Running Win 98

    I've managed pretty well with computer problems in the past,but this one has me scratching my bald patch,which is now extending by the day
    Sorry for the long post,but I was trying to supply as much info as possible.
    Thanks for your attention.John.

  2. #2
    Senior Member pctek's Avatar
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    Default Re: no display

    Quote Originally Posted by puffpuff View Post
    "no video signal"message on screen.
    Switched monitor with known working one:no result
    Removed graphics card and replaced with known working one:no result
    Removed and reseated RAM:no result
    Replaced bios battery(CR2032)on motherboard:no result

    .
    What does no result mean exactly? You mean you did all this and it still give no picture at all?

    Or it gives a picture sometimes?

    I'd say, if no picture still, then you have eliminated everything except the motherboard.

  3. #3
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    Default Re: no display

    Perhaps I should have said "no improvement",but you're right,absolutely no picture at all.John.

  4. #4
    Computer "Specialist" Agent_24's Avatar
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    Default Re: no display

    Replacing the battery might have cleared the BIOS settings too... you don't need to reflash or anything if you clear the BIOS, it's just the settings that get reset.

    But to ensure it has been reset, use the jumper.

    Going by the specs of that system, it could be bad capacitors. do any caps on the motherboard or video card look like these?

    http://en.wikipedia.org/wiki/Capacitor_plague

    If not, it could be the PSU. Have you tried using a known good power supply?
    Non-system disk or disk error. Replace and strike any key when ready.

  5. #5
    Senior Member pctek's Avatar
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    Default Re: no display

    Quote Originally Posted by Agent_24 View Post

    If not, it could be the PSU.
    I doubt that. A stuffed PSU isn't going to boot the rest of the PC and not the graphics card.


    It is booting right? Like you hear the HDD power up etc?

    If all the testing was done with known good parts - then it leaves the motherboard - AGP/PCI-E slot............

  6. #6
    Member beama's Avatar
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    Default Re: no display

    Ive had this happen before and it it turned out to be a software problem. The os had corrupted. To test this theory try booting with a linux live cd if you get a display suspect corrupt software if not go back to your hard ware.

    BTW
    does this pc have an on board video card if so is it disabled in the bios because you are using a addin card
    Trust me. I know what I'm doing.Sledge Hammer

    Linux the only way to get rid of the windows boot sector virus ( Geoff Palmer , Jun 28, 2004 Tips & Help : Tux Love, PCWorld NZ)

    Parkinsons NZ


  7. #7
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    Default Re: no display

    Yes,it is definitely booting up.I'll have another go at resetting the bios.I
    read somewhere that you can reset by leaving the battery out for at least a minute.Worth a try,at least.John.

  8. #8
    Member Grimy's Avatar
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    Default Re: no display

    When switching on do you get a POST beep?

  9. #9

    Default Re: no display

    Quote Originally Posted by beama View Post
    Ive had this happen before and it it turned out to be a software problem. The os had corrupted. To test this theory try booting with a linux live cd if you get a display suspect corrupt software if not go back to your hard ware.
    Any software problem will not affect the display before the OS starts booting. You should still be able to see all of the POST information before the OS starts.

    In this case it looks like the AGP slot has died. I guess if you can't see the BIOS it makes it difficult to change any settings, but you can change a setting to use PCI video cards instead of the AGP.

  10. #10
    Member beama's Avatar
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    Default Re: no display

    as I said before Ive had machines do exactly this and its been a software fault not all machince display post info on boot
    Trust me. I know what I'm doing.Sledge Hammer

    Linux the only way to get rid of the windows boot sector virus ( Geoff Palmer , Jun 28, 2004 Tips & Help : Tux Love, PCWorld NZ)

    Parkinsons NZ


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