When i plug my computer in to the vga port i get a message on the screen saying out of range

Hi, that message indicates that your video source is providing an unsupported video resolution , please check in settings that video output resolution is no more than 1920 x 1080 @ 60Hz.
Also remember to verify that HDMI is selected as input source at monitor.

You can try a different cable for VGA. Check if the port is lose. The green light is only indicating a proper power supply to the monitor. The display is very much dependent on the VGA cable. If your monitor also has HDMI port, you can try to connect using that cable (provided the display adaptor also has HDMI port). If nothing works for you, take it to a hardware engineer or local repair shop.

eMachines flat-screen monitors offer high quality at low cost.
eMachines flat-screen monitors are compatible with most brands of PCs.
Issues with eMachines flat-screen monitors can arise from faulty power sources, cable problems and incompatible settings.
These issues can be resolved by testing step-by-step each possible cause.

Plug the computer's power cable firmly into a working AC outlet.
Press the computer's power button.
Check the LEDs on the front of the computer case to confirm that the computer receives power.
Plug the eMachines monitor's power cable into a working AC outlet.
Press the monitor's power button.
Check the LEDs on the front bezel or power button of the eMachines monitor to confirm that the monitor receives power.
Orange or blinking LEDs indicate low power or no signal.
Green LEDs denote a working connection..

Perform a monitor self-test.
Switch off the monitor.
Unplug the video cable from the monitor.
Press the eMachines monitor's power button.
An eMachines logo, Windows logo or "no signal" message indicates that the monitor is working properly.

Plug the eMachines monitor's video cable into the video port on the computer.
Attach the monitor's included DVI-to-VGA adapter to the monitor's VGA cable if your computer has a DVI port (15 or 25 pin-slots with 1 side slot) in place of a VGA port (15 pin-slots, no side slot).

Press the eMachines monitor's input button to change the monitor's setting to match the computer port used.
Set your monitor to DVI if connected to your computer's DVI port.
Set your monitor to VGA if connected to your computer's VGA port.

Connect the eMachines monitor to a known working computer with a known working video cable if the problem persists. Contact Gateway, eMachines manufacturer, if the monitor issue is not resolved.

If its a flat screen monitor ?

eMachines flat-screen monitors offer high quality at low cost. eMachines flat-screen monitors are compatible with most brands of PCs. Issues with eMachines flat-screen monitors can arise from faulty power sources, cable problems and incompatible settings. These issues can be resolved by testing step-by-step each possible cause.

Plug the computer's power cable firmly into a working AC outlet. Press the computer's power button.

Check the LEDs on the front of the computer case to confirm that the computer receives power. Plug the eMachines monitor's power cable into a working AC outlet. Press the monitor's power button. Check the LEDs on the front bezel or power button of the eMachines monitor to confirm that the monitor receives power. Orange or blinking LEDs indicate low power or no signal. Green LEDs denote a working connection.. Perform a monitor self-test. Switch off the monitor. Unplug the video cable from the monitor. Press the eMachines monitor's power button. An eMachines logo, Windows logo or "no signal" message indicates that the monitor is working properly. Plug the eMachines monitor's video cable into the video port on the computer. Attach the monitor's included DVI-to-VGA adapter to the monitor's VGA cable if your computer has a DVI port (15 or 25 pin-slots with 1 side slot) in place of a VGA port (15 pin-slots, no side slot). Press the eMachines monitor's input button to change the monitor's setting to match the computer port used. Set your monitor to DVI if connected to your computer's DVI port. Set your monitor to VGA if connected to your computer's VGA port. Connect the eMachines monitor to a known working computer with a known working video cable if the problem persists. Contact Gateway, eMachines manufacturer, if the monitor issue is not resolved. Hope this helps.

OK, when you boot up next time press F8, and choose BOOT IN VGA MODE, this will then allow you to ar view the monitor, now, go into settings and make sure your video card resolution settings are set to say, 1280x1280, or maybe even less to start, say 1024x768, all 32bit. Now, when you restart next, the monitor should be OK. But, if it doesn't you will have to do it again, set lower, and then get a new Video Driver, and install, and try again, at the higher settings. If you cannot even boot up in VGA Mode, then i suspect the Monitor is faulty.

check the cable ..to be connected in the right post ..if you have a video card and a on board card ..you might connected it by mistake in the on board card port ..and this one is disabled cause you have another card on a Pci port...
another issue may be from the plug itself...try to move them cause this message is received only when it do not gets signal

try this when boot up start press the f8 then enable vga mode adjust the screen resolution to the standard setting

might be something wrong with your monitor's data cable

This means that you have an external video card (which is not outside the computer). This video card will be plugged into the motherboard. That message is saying that the port on the back of the computer that your monitor is plugged into is the wrong one. You need to look for another port on the back of the computer.

Here is a picture of a VGA port that you should use if you have a VGA cable to connect the monitor (Blue Ends).
http://news.softpedia.com/images/reviews/large/VGA.jpg

Here is a picture of a DVI port that you should use if you have a DVI cable to connect the monitor (White Ends).
http://zedomax.com/blog/wp-content/uploads/2008/09/dvi.jpg

So depending on the cable and connections that are available on your computer and your monitor depends on what you have to use. I hope that wasn't too confusing. Let me know if you need more info.

Are you connect via Analog (Blue VGA connection) or DVI (White Digital connection?

If you are connected via DVI, then you have to change the input select button to DVI

If you are Connected VGA, make sure the system doesn't have 2 VGA ports. If it does, connect to the other port.