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  1. #1
    afksn1p3r@aim.com is offline Banned Newbie
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    Default No Input Signal Message

    I have a HP Pavilion a1730n. Recently, while downloading a file my computer froze and I had to turn off the power supply. When I restarted it, I get a "No Input Signal Detected" message. I have removed the video card (Nvidia 8600 GT), but don't know how to access the onboard video. I've plugged in the VGA cable to the correct port, but i still get the same message. I'm assuming that onboard video is disabled so how do I enable it without going through the BIOS?

  2. #2
    Volvogga's Avatar
    Volvogga is offline Senior Member Always Around
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    What's wrong with going through the BIOS?

    If you have to, you could try resetting the CMOS. Get your instruction manual out and find where to jumper to do that. Or... pull the battery and let it sit with no power.
    Vol~

    thanks to Silverwmoon!

  3. #3
    Jakko's Avatar
    Jakko is offline Senior Member Community Builder
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    Quote Originally Posted by Volvogga View Post
    What's wrong with going through the BIOS?

    If you have to, you could try resetting the CMOS. Get your instruction manual out and find where to jumper to do that. Or... pull the battery and let it sit with no power.
    Correct me if I'm wrong, but even then, it sounds like the hardware is simply not communicating with the monitor. I could be wrong, heaven knows stranger things have happened when tinkering with computers, but I doubt resetting the BIOS will make that work. Sounds like the computer POST's just fine to me, it just doesn't communicate with the monitor.


    The thing I think we need to ask is this:
    "AFK, when you removed the video card, did you have on an ESD wrist strap? Were you on a rug/wearing socks? Did you touch the mobo, even to get a better grip whilst yanking out the video card? Did you at least touch the case so that you have the same potential?"

  4. #4
    MadDogMike is offline Senior Member Always Around
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    Quote Originally Posted by Jakko View Post
    Correct me if I'm wrong, but even then, it sounds like the hardware is simply not communicating with the monitor. I could be wrong, heaven knows stranger things have happened when tinkering with computers, but I doubt resetting the BIOS will make that work. Sounds like the computer POST's just fine to me, it just doesn't communicate with the monitor.
    His nVidia card was the one that stopped working, not the on-board one. Now he wants to use his on-board video card but it's been disabled in the BIOS. Without being able to see anything on his monitor, the only way to enable the on-board video card would be to reset the BIOS to default settings by clearing the CMOS. If it still doesn't work after that, then the monitor is faulty or maybe not plugged in properly.

  5. #5
    Jakko's Avatar
    Jakko is offline Senior Member Community Builder
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    Quote Originally Posted by MadDogMike View Post
    His nVidia card was the one that stopped working, not the on-board one. Now he wants to use his on-board video card but it's been disabled in the BIOS. Without being able to see anything on his monitor, the only way to enable the on-board video card would be to reset the BIOS to default settings by clearing the CMOS. If it still doesn't work after that, then the monitor is faulty or maybe not plugged in properly.
    That, or, like I am trying to say, he may have fried his motherboard when pulling out his video card(Hey, I did it once).

  6. #6
    MadDogMike is offline Senior Member Always Around
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    He got the "No Signal" message before he took the nVidia card out of his computer, so the original problem wasn't caused by static electricity discharged into the motherboard. He may have a new problem after he clears the CMOS though.

  7. #7
    qualia is offline Senior Member Respected Member
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    erm.. tried wriggling the cable..?

  8. #8
    afksn1p3r@aim.com is offline Banned Newbie
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    It's been a while, but it turns out that I may have fried the motherboard when i turned off the power supply. I've tested every component and they all work perfectly fine. Thank god for HP's great warranty services.

  9. #9
    irecinius is offline Senior Member Community Builder
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    If he is getting "no signal" that the monitor message for not reciving signal.
    Try to use that monitor on some other computer, sometimes the problem is somewhere else then you think..

    If the monitor works, continue reading:

    Now you going to strip down your computer, part by part and testing if it works each time. (Turning it on each time for each step)

    - Remove new hardware (if any)
    - Disconect external devices (if any)
    - Does your computer "Beep" or the LEDs flash in a strange way?
    (Last one can pinpoint your problem, so just post here what it sounds or looks like)
    - Check all your fans, see if they are working
    (Non working could be causing overheat and or detecting a fan failure, thus making it fail to boot)
    - Check all cables!
    (Verify all cables are pluged in all the way~)
    - Disconect all expantion cards
    (Video, network, modem, anything else pluged in your mobo)

    If your computer never changed the beeps, flasing or worked, this is your last hope:

    - Remove all your RAM memory.
    If your computer was not beeping and is now beeping turn off your computer and try the following:
    1. Re-insert the memory into the same slot.
    2. If you have more than one stick of memory remove all but one stick of memory, try rotating through each stick.
    3. Try one stick of memory in each slot.
    Remember to power cycle and test each time.
    If you're able to get the computer to boot with one or more of the sticks of memory it's likely you're dealing with some bad memory. Try to identify which stick of memory is bad and replace it.
    If you're able to get memory to work in one slot but not another slot. You're motherboard is defective you can either workaround the issue by running the memory in a different slot or replace the motherboard.

    - If you are unable to make it work anyway, your motherboard is RIP, go get a new one.
    "Chile is a thin and tall country"

  10. #10
    dominirican is offline Senior Member Regular
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    first thing you should have done was check the cable to see if maybe it came loose or just stop working and if your pluged in through a dvi to vga adapter it might be loose. Then you test your pc with a different monitor that you know works.

    And did you wait a few minutes after you unplugged it to open it up because alot of electricity stays in there after you turn it off

 

 

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