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I want to use my laptop as a monitor for my desktop

My desktop boots up but the monitor says 'no signal'. can i use my laptop as a monitor for my desktop?

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No, that won't work. The laptop's monitor only displays on the laptop, and there is no video input on the laptop. Have you tried hooking the monitor to the laptop and see if the monitor works? If it doesn't, then the monitor needs to be replaced. If it does, then your video card is faulty and needs to be replaced.

Thanks and please take a moment to rate as fixya.

Posted on Nov 15, 2008

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Check VGA cord connection, possibly try another, shorter VGA cord, plugging in cords BEFORE booting up computer, with monitor power on also. No signal is just computer telling you that it is not connecting.
You may have to go into Setup when computer boots up and turn on or select external monitor as some laptops may require this. Good Luck!
This is a great place for solutions that will save you lots of $$$$. I love it and it is my first contact with FixYA! jaballou

Posted on Nov 15, 2008

  • John Ballou
    John Ballou Nov 17, 2008

    Sorry that I got the problem wrong and thus the solution! I read it too fast and assumed that, as many users, you wanted to use your monitor to display your laptop screen. Antiochpc is right. There may be a video output on a laptop, but no video input, so the only real simple solution is to leave the laptop out of the equation and try to find out if the video card on your desktop is bad, as Antiochpc suggests! Sorry I got the problem wrong. I will begin remedial reading lessons soon! I hope the problem is solved. Good luck!

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If you can't see anything - even the text from BIOS when it boots, I would suspect that it is probably the monitor. If the PC USED to boot fine, then suddenly started behaving this way it is very possibly either the monitor or the signal to the monitor.

You didn't say if the PC is a desktop or a laptop. If it is a laptop, try to find an external monitor to connect to. Of course, in most cases laptops require that you switch them to a dual monitor mode, which will be difficult if you don't see anything on the main monitor.

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Hi there,
Please check if there is power to the system.
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This means the monitor believes it's not connected to the computer. Verify the cables first of all. Then try booting in safe mode (F8 key at PC startup) in order to verify that the PC is sending data to the proper video port (you might have a dual VGA / Digital output, for example, and the monitor might be connected to the wrong PC port). Quite often, a "bad signal" will be the same of "no signal"; and you can have a bad signal if the monitor resolution on the PC is set too high. This could happen if you installed a high-resolution capable monitor, and then replaced it with a not-completely-plug-and-play, lower resolution one. The PC would keep sending hi-res signals to a monitor which can neither interpret them, nor tell the PC "please slow down". To check this last possibility, reboot your computer while the monitor is ON. When PCs reboot, they usually drop back to standard VGA signaling, which all monitors understand. If the monitor abruptly comes to life and displays a boot screen, then goes No Signal again after several seconds, you've got a resolution issue; get in Safe Mode with F8 key at boot, and modify the screen properties (right-mouse button on the desktop, then Properties).

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hi there,

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-by right-clicking on the desktop background, goto:
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here enable 2nd monitor.

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