How can i display a portable swivel projector from my laptop using a vga connection? Once im connected all i see is a color bar screen on the wall, do i press something to enable the picture?
There are different types of video outputs which your laptop may or may not support. The three most common types of video outputs used with overhead projectors are Video Graphics Array (VGA), Separated Video (S-Video) and High Definition Multimedia Interface (HDMI). You need to make sure your laptop has the correct output corresponding to an input on the projector you will use.
Weigh the strengths and weaknesses of each types of video input and output. VGA projectors are the most common type, indeed it is likely that any projector in current use will have a VGA input. However, VGA video offers the lowest resolution of the these three types. S-Video offers a higher resolution than VGA, but is prone to screen flicker, especially when you are connecting your laptop to a power supply while presenting, rather than running off the battery. HDMI offers the highest picture quality of the three, and supports audio data transfer as well. However, know that HDMI-equipped laptops and projectors are more expensive than those that utilize the other video transfer formats.
Choose a video data transfer standard best suited to your price range and needs. VGA is always the safest bet, but if you are purchasing a new laptop computer, try to find one within your budget with an HDMI output as well, as it will provide the best quality and allow you to transmit audio without the use of extraneous equipment. S-Video inputs are found on nearly every LCD and Plasma television, meaning that if you are giving your presentation connected to a television rather than a projector, this is a viable option as well.
Make sure you know how to tell your computer to recognize that you wish to use a projector as a secondary video output device. On Windows-based laptop computers, this usually involves pressing the "Function" (or "Fn") key, followed by one of the numbered "F" buttons along the top of your keyboard. In most cases there will be a graphic of what looks like a television screen on the correct "F" key (e.g. "F4"), but if you aren't sure consult the manual that came with your specific model.
Connect your video cable of choice to your projector and your Windows laptop, turn the projector on, and press the correct function key. If you have a solid video card, pressing the same key combination a second time will allow you to view your laptop's screen both on the computer itself and as a projected image simultaneously.
Connecting a Macintosh laptop computer to an overhead projector can be a little trickier. You will need a special adapter to connect to a projector using VGA, as well as the standard VGA cable. This is called a DVI-VGA adapter, and is available both from Apple and other electronics vendors. Plug the adapter to the DVI port on your Macintosh laptop, then plug the VGA cable into the projector and the adapter. Turn on the projector, then press and hold the "F7" key on your Mac. You will be up and running in no time.
Try a dry run of your presentation using your own laptop and the same projector you will be using, if possible. It pays to be prepared, and your audience will be able to tell if you are fumbling around for the right function keys on the day you present. Your confidence will help you start your presentation off with a bang, and it will show.
Aug 30, 2010 |
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