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Identifying available connections
The first step in connecting your computer to a TV or projector is finding an identical port on both machines. Once the matching port has been identified (one that is the same on both your input device and output device), you need the appropriate cable to connect them. This section contains a picture of the back of an Epson projector and its available connection ports; as well as descriptions of each.
The HDMI connection is very popular among display electronics. In fact, nearly all modern televisions and projectors feature HDMI ports. Most laptop computers support HDMI and it is becoming more prevalent on both desktop as well; even without a high-end video card. HDMI is quickly becoming the standard for all electronic equipment for its high quality signal and ability to carry both audio and video signals. The image to the right is that of an HDMI cable.
The VGA connection is the most common among both desktop and laptop computers, is found on most projectors, and some TVs. The VGA cable has a 15-pin connector on each end that plugs into a VGA port on each device. Due to the fact that most televisions do not support VGA, we recommend using HDMI for their wider range of compatibility.
Tip:VGA cabling is universal for devices that support it. For example, the if your desktop monitor that uses a VGA cable it, that same cable can be used by a laptop to connect it to a projector.
Note: If you are using an Apple desktop or laptop you need a VGA adapter to connect a VGA cable to the computer.
The DVI connection is newer than VGA and it offers a sharper image. Although the DVI port is not shown on the Epson model above, it is still somewhat common for projectors, not so much for televisions. It is mostly found among desktop computers for monitors, but some laptops have DVI connections as well (Apple laptops are more commonly known to support DVI than any other brand of laptop). Since finding DVI on a TV or projector is more difficult, we again recommend using HDMI cables.
Tip: There are special cables that convert from DVI to VGA or DVI to HDMI and vice versa.
The composite video connection is quite common on a TV or projector, but it is nearly nonexistent on modern computers. This connection is the yellow female cable on what is normally a three bundle of red, white, and yellow. The only time you should see this setup is on older video cards for desktop computers.
The S-Video connection is also commonly found on TVs and projectors, but solemnly on a desktop or laptop computer. This connection is a small step up from composite video, but is nearing obsolescence.
Connecting computer and projector or TV
After you've identified what connections are available on both your computer and TV or projector, you're ready to connect the cables. If the same connections are not available for both the computer and TV or projector, you'll need to purchase a video converter cable that converts one signal into a compatible signal.
For a desktop, you simply need to plug the cable into the computer and output device. If you don't see an image, you may need to change the display using the following steps.
Press the Windows Key.
Type Adjust screen resolution and press Enter.
Find Display and click the down arrow on the right-hand side of the box.
If you're connecting a laptop computer to a TV or a projector you'll often need to "send" the video signal to the display device. The key sequence to do this varies depending on the laptop; but usually it's either: Fn + F3, F4, F5, F8, or F9. For example, pressing and holding Fn + F3 at the same time on my laptop sends the video signal to my connected TV instead of the laptop's screen. The corresponding key used with Fn may be labeled as CRT/LCD or have a picture of a monitor on or close to the key. Additional help and information with switching the laptop display can also be found on the link below.
Switching TV inputs
Finally, if you're connecting a computer to a TV make sure it has been switched to the correct input. For example, if you connected an HDMI cable to your computer and the "HDMI 2" port on your TV, you'll need to switch to the "HDMI 2" input. This action can be accomplished by pressing the input button on your TV remote until the correct image is displayed.
1st of all you need to connect the projector with your laptop turned off. One the laptop has finished booting and loading windows. Hit the Fn+f4 or f7 key to switch between the displays then you will get the display.
But if this also does not give display then you can check with the projector with Video INPUTS (Eg. Input 1 / Input 2 etc.,)
You probably have to tell the laptop to send a video signal to an external display--(i.e. <altF4 or <altF8) The proper function key will have a TV screen symbol on it. Default mode is "laptop only" By pressing and holding the alt, then pressing the appropriate function key, the laptop will switch to the next mode, laptop/external display. The last mode is external display only. By pressing the sequence again, you'll return to "laptop only" mode.
The max resolution on the projector is 1024x768. But the problem you're having sounds suspiciously like the laptop not sending out a video signal...you have to *tell* the laptop to send out an image to an external display. On one of the function keys, like F4 or F8, there will be a small TV screen symbol. You have to press and hold "alt" and then press the key with the symbol. The initial setting is obviously for the laptop only. When you press the keys for the first time, you tell the laptop share the picture with an external display (your projector). Press the keys a second time, and the laptop ONLY displays an image from the projector. And, press the combination again, you're back to just the laptop.The DLP projector should have a menu selection for "auto" under the input menu...that is the easiest and most trouble-free setting. Whatever you connect to the projector, it automatically seeks out the signal and connects to it.---Rick
Using the Display
When you start the computer with an external device (such as an external
monitor or projector) attached and turned on, the image may appear on either the
display or the external device.
Press <Fn><F8> to switch the video image to the integrated
display only, the integrated display and an external CRT monitor simultaneously,
an external CRT monitor only, the integrated display and an external DVI monitor
simultaneously, external DVI monitor only, and external CRT monitor and external
DVI monitor simultaneously.