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My dell desktop was working fine but now when i turn it on the harddrive lights up but the screen says no signal then the screen turns off. ive hooked up to my t.v. it says the same thing no signal so its not the moniter at fault

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  • Red Gatdula
    Red Gatdula Aug 24, 2010

    HI,
    Do you hear a beeping sound when you open the computer? .
    usually that indicates where the main problem is.


    You can try reseating the memory on it.
    Check the cables inside it might be loose.
    also check you video card.

    Cheers!!

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If you are useing a video card,try pulling it out and reseating it.if you are useing on board video try clearing the bios per your instruction manual then re do the settings of the bios(ie:date,time,boot priority etc.)and see if the monitor comes back on.or while in the bios u can just set it all to default settings.also try to reseat the memory.

Posted on Sep 03, 2010

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If you get some beeps and video works with ram chips out, then its a bad ram chip.

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Screen does not turn on but green light is on.


Green light indicates the monitor is getting power. Nothing coming up on the screen indicates, No Signal.

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A bad power supply in the computer can cause this. A bad power supply is the leading cause of desktop computer failure. It is replaceable, and can be done by the owner relatively easy.

You may have a computer tower that the Power light comes on, you hear fan/s spinning, (Including the Power Supply fan), and it sounds like the harddrive is running.

ALL the lights in your computer use less than 1 Watt.
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A weak Power Supply will have enough power for lights, fans, and that harddrive sitting there spinning.
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For a test, connect your monitor to a know good computer. See if it works.
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My Dell Dimension 4600 will not turn on. Steady Amber Light


Disconnect the Power cable / A/c adapter/Battery from computer.
Disconnect External peripherials.
Hold down the power button on the computer for 10 seconds.
Reconnect the power cable or A/c adapter and battery or the computer
Try to turn on the computer
check for Led's on the computer
If still no display ,shut down the computer,disconnect power cable.
Open the computer tower,remove memory modules,reconnect power cable and turn on the computer.If you get a beeping sound after turning on you should be getting beeping sound suggesting the mother board is not bad.Turn on the computer and disconnect power cable from computer.
Reseat 1 memory at a time if you have 2 memory module or if single memory module reseat in different memory slot,swap memory module.
Reconnect the power cable and turn on the computer if it boots to desktop possible issue with 1 of the memory module.
Disconnect the harddrive ide cable from the harddrive .Turn on the computer.
If still unable to power on .Shutdown the computer and disconnect power cable.Remove video card,sound card ,modem card if any .Connect just the vga cable from monitor to the integrated video port.
Connect power cable and turn on the computer.
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When i turn on my computer it works perfectly fine apart from the srcreen is not picking up my signal ive tried the screen on another pc it works fine and im not sure what ive got to do.


Try disconnecting power......reseat the video card, unless it is onboard. If it is on board video then the mother board is garbage. You can insert a 3rd party video card and try that and see how it works.

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