Computer used to work with projector, and now doesn't?
My computer used to work when connected to a projector. There is now no
image when I connect it, but the projector recognizes it (blue screen
goes black). There is just no image projected...it stays black.
I have tried this with 3 projectors, and all don't work. Is it my graphics card driver? I have no ideas...
Re: Computer used to work with projector, and now...
Have you tried pressing Fn F5? On my system (HP), by computer monitor goes dark when I connect the projector. Pressing (Function) FN F5 toggles the video between Computer Monitor, Projector, or Both.
Check the function settings for your computer. On my Compaq laptop at home, the video function is F4, so there may be different settings for your computer.
Re: Computer used to work with projector, and now...
Have you tried pressing Fn F7? when you hold down the Fn key you can tap F7 and a little icon will come up with 3 boxes, LCD (this means projector only) Monitor/LCD (this means the computer screen will be on along with the projector screen,) then the last box will say Montior (This means you will have only the comuter monitor screen on) To get the computer screen and the projector both on to work simulatneously you want the Monitor/LCD
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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.
If you're using a laptop then look for the key that sends the image to the projector. Usually you have to connect the cable between the computer and laptop with both units powered down. That way when the PC boots it will see the projector is connected.
if your desktop doesn't have a standard vga socket then you can get a dvi adapter that fits onto the end of a vga lead. you will still need a seperate cable for audio as a dvi connection only does video.
On the remote control of the projector, you'll notice an "Auto Image" button (or similar to it). What it does is synch the signal between the PC and projector. You might also want to check the keypad of the projector, normally there's an Auto button on there also.
Look for the F-key with a square/icon of a laptop. Press FN+This button until you see your screen display show that it will be using your LCD + the output on your computer. Remember you need to hook both the VGA or HDMI out to the projecter as well as the USB cable.
If your projector displays no image, this could be a variety of problems. First, check that the projector has power. On the top of the LCD or DLP projector should be some lights. With power, those lights will be on. If it has power, check to make sure that the projector lamp is firing. If so, go to the source. Make sure that it is connected with a VGA cable or USB cable to your computer, or with an RGB cable, S-Video cable or DVI connection to your VCR/DVD Player. From a laptop computer, the VGA cable should be connected to the VGA out connection, and into the VGA in connection on the projector. Are both ends tight?
If everything has checked out so far, the solution probably lies with the external monitor port. Check this by holding the Fn key on the keyboard, then press the F7 key. (On some computers, the key might be F5 or F3. Try these if F7 doesn't work) Each time you press the Fn / F7 combination, you will cycle your display through the following settings:
* Press Fn / F2 or F2 once: The laptop screen only * Press Fn / F2 or F2 twice: The projector port only * Press Fn / F7 or F2 three times: Both the laptop and projector port * Wait a few seconds after each time you press the key combination to let the LCD or DLP projector refresh. Nine times out of ten this will result in seeing your projected image.
this should help you :)