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Re: no video out to monitor from desktop.
Sure not hard at all. if the monitor is connected to the default onboard video adapter, this is usually one of the first things to malfunction on a new computer. if the monitor works when connected to another machine, but when connected to the desktop the monitors amber or orange light comes on but no video, this usually means there is a connection problem. usually most modern monitors will display a "no input" or "no video" message meaning the connection to the computer is bad. try getting a new video adapter (usually pci/pcie video card) and installing into the pci/pcie video slot in the back of the computer. most are plug and play and require little to no configuration. you should be able to find a nice one for about $20 - $30 dollars at www.tigerdirect.com . hope this helps. please rate me and thanks for choosing enterprise computing solutions.
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Below is information that should help you with trying to get monitor and notebook screen to work.
First make sure your laptop is equipped to be able to connect a secondary display, there should be a port for connecting a standard monitor cable on the back.
Connect your secondary monitor and reboot the laptop, the system bios should recognize that a second monitor has been added.
Then right click on your desktop and bring up the display properties dialog box.
Your laptop should be identified as monitor 1 and you should also be able to see the secondary monitor as monitor 2.
Click on the secondary monitor and check the box that says "Extend my Windows desktop onto this monitor".
Set your screen resolution and color quality for the second monitor and click apply.
Directing icons and browser windows over to the other monitor is just a matter of drag and drop.
Dell Social Media and Communities
You have proved the monitor is OK.
If the desktop appears to boot up then the most likely problem could be a faulty video card OR the video card setting has been changed that is outside the range of the monitor's capabilities, ie, the refresh rate set too high (set it to 85Hz or less) or the screen resolution is set too high (set it to 1024x768).
You may need to connect a different monitor to the desktop to get a display to lower the video settings.
Normally a laptop has an external video output in the form of S-Video, VGA, or HDMI. Once you have connected the laptop to the television through one of the available outputs. You will have to enable the external video out on the laptop. Normally this is done by pressing the FN and a labeled F key. Example: If the laptop was a HP you would press FN + F4 to enable the external monitor. Gateway, eMachines = FN + F4. Dell FN + F8. You will have to look at your keyboard close and look for what looks like a little monitor. That key + FN will most likely be how you enable the external monitor.
Once connected, you use the FN + F4(from example) to cycle through the video modes. The video modes are usually Laptop LCD and external monitor, external monitor only, Laptop LCD only,
If you would like to extend your desktop to the external monitor instead of clone the desktop than you will have to go into your display properties and click on the second monitor and check the box that states "extend the desktop onto this monitor". This will allow you to drag windows from the laptop LCD to the external monitor.
The monitor detects the presence or absence of synchronization signals so your video (integrated or otherwise) isn't putting out video or sync signals.
This could be because the boot isn't happening as it should or just a bad video installation.
This is known as bleeding in LCD .you can try to update video drivers or try to connect external monitor (any normal desktop monitor) and see if same thing happens on external monitor then most probably it is the video card if on external monitor works fine then it is issue with LCD .if system is in warranty then get in touch with dell support
yes, it sounds like somehow the back light behind the LCD has gone out, cheaper to replace the whole LCD then to replace the light itself, but do connect a desktop monitor to it before you go out and buy one, if it works fine then you know its the lcd, if it does not work then it may be the internal video card.